Kara arranges to meet both James and Winn behind the building as Supergirl in episode 1x02 "Stronger Together".
Two soldiers sent by Astra attack Hellgrammite for his indiscretion at the chemical plant in episode 1x02 "Stronger Together".
Kara and Alex spot the helicopter falling through the sky and Kara runs off to become Supergirl in episode 1x04 "Livewire".
Cat confronts Livewire outside their old radio station in episode 1x04 "Livewire".
Kara flies in as Supergirl and quickly changes into her street clothes to pick up Cat's son Carter from school in episode 1x05 "How Does She Do It?".
Kara sets up a trap for Red Tornado while the rest of the team hunts its operator in episode 1x06 "Red Faced".
Kara falls to the ground in a trap set by Astra in episode 1x07 "Human for a Day".
Kara heads to Winn's father's old factory and falls into a trap in episode 1x10 "Childish Things".
Alex leads a DEO team to capture a escapee when the Master Jailer attacks in episode 1x14 "Truth, Justice and the American Way".
Alex and Kara try to save Detective Warren from the Master Jailer but Alex gets shot in the process in episode 1x14 "Truth, Justice and the American Way".
Kara shows up to support a young girl who is being bullied for her homemade Supergirl costume in episode 1x16 "Falling".
Supergirl saves a firefighter at a burning building and then gets infected with the Red Kryptonite in episode 1x16 "Falling".
Indigo scares off a newly engaged couple and then meets Non on a roof in episode 1x16 "Falling".
K'hund is robbing an armored car when the DEO arrives to stop him in episode 1x16 "Falling".
Winn finds Siobhan on her apartment's roof in episode 1x17 "Manhunter".
Kara runs down the alley and makes several attempt to fly in pilot episode.
After being rescued by Barry, he and Kara end up in a field outside the city where they introduce themselves in episode 1x18 "Worlds Finest".
Supergirl takes the fight against Reactron from the fundraiser to an empty lot in episode 1x03 "Fight or Flight".
Alex and Hank land in town and Hank struggles to shield Alex and himself from the Myriad signal in episode 1x19 "Myriad".
Lena is taking off in her helicopter when it is attacked by several drones in episode 2x01 "The Adventures of Supergirl".
Supergirl fixes the support to prevent the L Corp building from falling over in episode 2x01 "The Adventures of Supergirl".
Supergirl and Superman help the firefighters put out a building that is on fire in episode 2x02 "The Last Children of Krypton".
Clark lands back in Metropolis and quickly receives a call from his boss in episode 2x02 "The Last Children of Krypton".
Lena Luthor is announcing the rebranding of Luthor Corp when the event is attacked by the assassin John Corben in episode 2x01 "The Adventures of Supergirl". Lena gives a press conference about the sick children and someone takes a shot at her in episode 3x05 "Damage". Ben Lockwood hands out anti-alien fliers before the terraforming attack and months later he spies Dean Warren while talking to a crowd in episode 4x03 "Man of Steel".
Metallo 2 attacks a park in Metropolis while Superman is in National City in episode 2x02 "The Last Children of Krypton".
James and Winn are walking through the market when a telekinetic alien attacks in episode 2x20 "City of Lost Children".
Kara and Clark head to the industrial district where Metallo is unloading equipment in episode 2x02 "The Last Children of Krypton". Brian is being kidnapped by Cadmus when Alex and Maggie show up to rescue him and gather intel in episode 2x15 "Exodus". J'onn and Kara watch M'yrnn as he marvels at Earth in episode 3x03 "Far from the Tree". Kara is thrown to the ground by the dragon and gets a tip from Alex which allows her to calm it down in episode 4x06 "Call to Action".
A hiden alien-friendly bar where the gang regularly hangs. Maggie Sawyer takes Alex to a secret alien bar in episode 2x03 "Welcome to Earth". Hank returns to the bar to apologize to M'gann only to be captured by Roulette in episode 2x04 "Survivors". Hank confronts M'gann about her true nature in episode 2x07 "The Darkest Place". Mon-El follows the real Hank Henshaw outside as and fights him as the virus is released inside the bar in episode 2x08 "Medusa". M'gann and J'onn are attacked by the White Martian Armek outside the bar in episode 2x11 "The Martian Chronicles". Mon'el draws out Mr. Mxyzptlk and challenges him to a duel in episode 2x13 "Mr. & Mrs. Mxyzptlk". Cadmus agents kidnap Lyra and several other aliens from the bar but Guardian manages to capture one of them in episode 2x15 "Exodus". Kara heads outside to clear her head and gets a pep talk from Cat Grant in episode 2x21 "Resist". Winn runs outside after hearing about his father's death and James talks to him in episode 3x14 "Schott Through the Heart". Agent Liberty throws a bomb at the bar with a few of his anti-alien bigots in episode 4x03 "Man of Steel".
Maggie is interviewed by the news about the apparent Guardian murders in episode 2x07 "The Darkest Place".
James returns to the van after another bit of vigilanting and he apologizes to Winn and brings Lyra back onto the team in episode 2x18 "Ace Reporter".
Kara finds Lillian and agrees to team up to rescue Lena in episode 2x21 "Resist".
Manchester Black accompanies a very drunk Officer Petrocelli out of the bar and learns about an upcoming anti-alien attack in episode 4x04 "Ahimsa".
The blast of purple energy hits the RV that houses, Jerry, his sister Bobbi, and his drug dealing buddy Kevin turning their supply purple in episode 4x11 "Blood Memory".
The Elite livestream a video from a secret mercenary base where the mercenaries were torturing aliens announcing their murderous manifesto in episode 4x13 "What's So Funny About Truth, Justice, and the American Way?".
Otis drops Mikhail off somewhere safe and warns him to stay away from bald men in episode 4x16 "The House of L".
President Marsdin hosts a press conference for her signing of the Alien Amnesty Act but this too is interrupted by an attack by Scorcher in episode 2x03 "Welcome to Earth".
Kara is walking through the gardens thinking about her future when she is attacked by a drone controlled by Felra in episode 3x21 "Not Kansas".
Alex joins Maggie outside a warehouse in a fancy outfit for their not-a-date at the fight club in episode 2x04 "Survivors".
Hank and M'gann are forced to fight each other at Roulette's fight club but are saved by Supergirl and the DEO in episode 2x04 "Survivors".
The Resistance is constructing a portal to another world when they are attacked in episode 3x08 "Crisis on Earth-X, Part 1".
Maggie and Alex track down the Quill who is a suspect in the murder of the alien in episode 2x04 "Survivors".
Kara confronts Gayle Marsh as she is loading up her loot and is finally able to resist the fear in episode 3x02 "Triggers".
Alex arrives at the police station just as Maggie is forced to release Roulette and then she asks Maggie out for drinks in episode 2x04 "Survivors". Maggie is walking Chet and his cohorts to the transport van when the three criminals are killed by Cadmus in episode 2x05 "Crossfire".
Lena invites both Kara and Supergirl to her gala where she lays a trap for the three criminals terrorizing the city in episode 2x05 "Crossfire".
Supergirl arrives to find the gang using an anti-gravity gun during their latest heist in episode 2x05 "Crossfire".
James reveals his face to a panicking woman before heading inside to save her child in episode 3x23 "Battles Lost and Won".
The mysterious leader of Cadmus meets with the criminal gang and provides them with the new alien weapons they requested in episode 2x05 "Crossfire".
Alex heads to the parking garage to ask Maggie to lay off Guardian and ends up talking about her feelings in episode 2x07 "The Darkest Place".
Kara once again tries to stop Gayle Marsh but finds herself again debilitated by fear in episode 3x02 "Triggers".
Kara attempt to stop a bank robbery only to find the perps sporting alien weaponry in episode 2x05 "Crossfire". Maggie is trying to negotiate with some band robbers who took hostages when Kara bursts in through the roof and takes them out herself in episode 2x19 "Alex".
Kara smashes into the ground unconscious and is surrounded by bystanders in episode 3x09 "Reign".
Mon-El attempts to be charitable and is captured by Cadmus for his trouble in episode 2x06 "Changing".
Mon-El and Guardian stop the mutated Dr. Jones from killing Rand O'Reilly and other bystanders until Supergirl can arrive to stop him once and for all in episode 2x06 "Changing".
Reign and Kara smash to the ground in the street and Kara takes a beating in front of a bunch of bystanders in episode 3x09 "Reign".
A group of researchers in the arctic find a frozen wolf body and something goes terribly wrong when they go to dissect it leading to the D.E.O.'s investigation in episode 2x06 "Changing".
Dr. Jones heads back to his lab after being rescued by the DEO and kills his boss who wants to fire him in episode 2x06 "Changing".
James interrupts a deal between Brian and his drug dealer and squeezes some information about the attack on the square from him in episode 2x20 "City of Lost Children".
James, Winn, and the alien refugees leave their hideout to watch the spacecraft flying over the city in episode 2x20 "City of Lost Children".
Kara finds Thomas Coville beneath the stadium with the Kryptonian pod set to detonate in episode 3x04 "The Faithful".
Kara arrives at a robbery by the Children of Liberty in time to save Manchester from being shot in episode 4x07 "Rather the Fallen Angel".
Lex supervises a series of tests of Snowbird's strength and abilities in episode 4x16 "The House of L".
Dr. Jones tries to kill Rand O'Reilly who is saved by Kara & Hank who have to be saved in turn by the DEO in episode 2x06 "Changing".
Barry and Oliver learn that Deegan has taken on the guise of Superman in this altered reality but they manage to escape him despite not having any powers in episode 4x09 "Elseworlds, Part 3".
Kara fights with Hank Henshaw who has been transformed into Cyborg Superman and then she escapes through tunnels with Mon-El in episode 2x07 "The Darkest Place".
Deegan performs unethical experiments in the opening and after being defeated he is locked up next door to Psycho-Pirate in episode 4x09 "Elseworlds, Part 3".
Eve condescendingly briefs Snowbird on her mission while they sneak underground in maintenance uniforms in episode 4x17 "All About Eve".
Lena and Kara use some leverage on the warden to gain access to Lex's old cell so they can search for evidence in episode 4x18 "Crime and Punishment".
Cyborg Superman breaks into the lobby of L Corp to steal the isotope needed to use the Medusa virus but is thwarted by Kara in episode 2x08 "Medusa". Snowbird poses as Kara and gets into the elevator with Lena to meet her before being admonished by Eve in episode 4x16 "The House of L".
Lyra takes Winn to the art gallery and convinces him that they should break in to have some hot museum sex in episode 2x16 "Star-Crossed".
Lena and James both testify against Lex, he poisons the judge and the jury as the verdict is read, and meets Eve for the first time as he is being marched to prison in episode 4x16 "The House of L".
Kara and Mon-El find themselves trapped on Slaver's Moon after Mon-El ignores Kara's orders and follows her through the portal in episode 2x09 "Supergirl Lives".
M'yrnn gives J'onn one final memory before shapeshifting into the Earth to stop the destruction in episode 3x23 "Battles Lost and Won". J'onn returns to the spot where his father gave his life and is confronted by Manchester who has recovered a powerful Martian staff in episode 4x15 "O Brother, Where Art Thou?".
Kara and Mon-el head to the police parking garage where a group of officers is under attack by what appears to be Livewire in episode 2x10 "We Can Be Heroes".
Kara yells at Mon-El outside the DEO after he disobeyed her orders and put the police officers at risk in episode 2x10 "We Can Be Heroes".
Livewire is being tortured to extract her powers by a mad scientist at an abandoned power company. Guardian and Mon-El arrive to rescue her but get in over their heads until Supergirl arrives in episode 2x10 "We Can Be Heroes".
Maggie and the cops show up to find a criminal tired up for them by Guardian in episode 2x10 "We Can Be Heroes".
Kara tries to stop Lillian and Metallo from fleeing but is forced to save a bunch of bystanders in episode 2x12 "Luthors".
A group of schoolchildren watch Superman fly overhead and later cheer after he saves them from the falling crane in episode 4x09 "Elseworlds, Part 3".
John Corben is being questioned during Lillian Luthor's trial when he attacks the courtroom using his Metallo abilities in episode 2x12 "Luthors".
Lillian takes Lena to one of Lex's hidden lairs to retrieve some anti-alien weapons from an armory in episode 2x12 "Luthors".
Ben Lockwood holds a rally to announce his racist policy and a peaceful pro-alien march converges on the event in episode 4x14 "Stand and Deliver".
Supergirl stops a group of thieves outside a jewelry store but is quickly bothered when Mr. Mxyzptlk shows up in episode 2x13 "Mr. & Mrs. Mxyzptlk".
Ben Lockwood is holding a rally after accepting his new role as Alien Affairs Liaison when the Elite attempt to assassinate him. Later, Kara decides to join the pro-alien rally as it travels towards the Alien Affairs Building in episode 4x14 "Stand and Deliver".
Jeremiah returns to the Cadmus facility after stealing the list from the DEO in episode 2x14 "Homecoming". Cadmus is loading the kidnapped aliens onto their spaceship to send deep into space when Alex shows up to infiltrate the facility in episode 2x15 "Exodus".
Maggie shows Winn footage of his night at the art gallery but Lyra doesn't show up anywhere on the footage in episode 2x16 "Star-Crossed".
Kelly talks to James in the car while dropping him off at his first therapy session and then gets a call from Alex in episode 4x18 "Crime and Punishment".
Kara and Rhea meet to fight a single combat for the fate of Earth in episode 2x22 "Nevertheless, She Persisted".
J'onn talks to Kara as they watch the ceremony from a nearby rooftop in episode 3x01 "Girl of Steel".
Oliver gets a call from Felicity about the wedding while he is fighting a group of ninjas in episode 3x08 "Crisis on Earth-X, Part 1".
The evil versions of Kara, Oliver, and Wells assemble on a rooftop after their attempt to kill the heroes fails in episode 3x08 "Crisis on Earth-X, Part 1". After landing on a roof, Reign holds an injured Kara over the edge before dropping her to the ground in episode 3x09 "Reign".
Supergirl comes to help as Maggie and Alex are chasing down a truckfull of thieves with heavy weaponry in episode 3x01 "Girl of Steel".
Everyone arrives in Central City for the wedding in episode 3x08 "Crisis on Earth-X, Part 1".
Maggie and Alex keep watch during the unveiling ceremony for the Supergirl statue which Lena Luther is presenting in episode 3x01 "Girl of Steel". Citizens run in a panic as Reign's earthquake rips through the city in episode 3x22 "Make it Reign".
Source: Floriana Lima — Instagram
Kara tries to stop Psi from robbing a bank but she uses her powers to stop escape in episode 3x02 "Triggers".
Sam wakes and gets Ruby ready for school and later they talk about Ruby's fight in episode 3x02 "Triggers". Lena stays at Sam's house after the attack during her press conference in episode 3x05 "Damage". Sam wakes up from a nightmare and realizes she doesn't remember her trip the day before in episode 3x09 "Reign". Sam plays with Ruby in the morning and then sees a newspaper on Reign's attack in episode 3x10 "Legion of Superheroes". Sam is watching a movie with Ruby when she has a terrible feeling in episode 3x21 "Not Kansas". Ruby encourages Sam to tell everyone about her new symptoms in episode 3x22 "Make it Reign".
Source: AprilBC23 — Twitter
Kara goes to save someone from a fire only to learn he put himself in danger just to be saved in episode 3x04 "The Faithful".
James and Winn accompany Kara to the meeting listed on the strange pamphlet and find themselves in a Cult of Supergirl meeting in episode 3x04 "The Faithful".
Lena brings James to a meeting with a contact but they are attacked by a guy with a laser gun in episode 3x09 "Reign".
Reign interrupts a gang deal on the docks killing all of the gang members involved in episode 3x09 "Reign".
Kara fights a dominator and chats with Alex in episode 3x08 "Crisis on Earth-X, Part 1".
Barry and Oliver hide from a passing police car while discussing who they can go to for help in episode 4x09 "Elseworlds, Part 3".
Kara leaves her symbol on the roof to draw out Reign and then confronts her when she arrives in episode 3x09 "Reign".
Kara and Reign smash into an office holiday party and smash up the place during their fight in episode 3x09 "Reign".
Ben Lockwood ambushes Lena in the lobby to ask about his father's foundry in episode 4x03 "Man of Steel".
Sam picks Ruby up from school to play hooky for the day in episode 3x13 "Both Sides Now".
Sam is trying to spend a normal day skating with Ruby only to have Reign take over and leave Ruby alone in episode 3x13 "Both Sides Now".
The team searches for Pestilence after several people in city hall get sick from a mysterious illness in episode 3x16 "Of Two Minds".
Menagerie's theft and murder is interrupted by the Children of Liberty and later Kara arrives and fights her outside with an assist from Dreamer in episode 4x12 "Menagerie".
James confronts Olivia and the cultists as Guardian to rescue Tanya but is unmasked and chased away when the police arrive in episode 3x19 "The Fanatical".
Tanya tells James that she thinks his identity as the Guardian is cool in episode 3x19 "The Fanatical".
The pod lands outside the strange city and Kara heads into town and grabs a disguise with her companion in episode 3x20 "Dark Side of the Moon". Kara is talking to some locals in the market when a construction crane collapses and later she goes to dinner with her old childhood friend Thara in episode 3x21 "Not Kansas".
Alex takes Ruby out for ice cream and a mysterious man tries to kill her in episode 3x20 "Dark Side of the Moon".
Ben Lockwood is escorted to jail through a crowd of supporters which includes his wife in episode 4x08 "Bunker Hill". Ben Lockwood is released from jail and gives a speech to his supporters in episode 4x12 "Menagerie".
Alex tracks Ron Collins down to a bar and confronts him about the attempt on her life in episode 3x20 "Dark Side of the Moon". J'onn talks to the cop that Fiona had marked on her computer and learns that he has anti-alien sentiments in episode 4x02 "Fallout". Manchester Black approaches Officer Petrocelli and gets him drunk to gather information on the anti-alien group in episode 4x04 "Ahimsa".
J'onn and James meet with the CEO of the company that produces the custom rifles for the DEO to track down the weapon that was used against the cop in episode 3x21 "Not Kansas".
Alex talks to one of the partners about Arthur Willis and how he might attack the office in episode 3x21 "Not Kansas".
James saves the life of a police officer who is shot at by a man with a powerful rifle in episode 3x21 "Not Kansas".
James meets with Tom who then has him kidnapped by a group of Children of Liberty thugs in episode 4x06 "Call to Action".
Kara and Alura rush to save civilians as the earthquake shakes the city apart in episode 3x23 "Battles Lost and Won". Kara saves a crowd from a falling meteor and later attends a press conference by the president about the alien summit in episode 4x01 "American Alien".
Kara returns a stolen piece of artwork to a museum in episode 4x01 "American Alien".
Lena meets with the D.A. Diaz to hand over information on one her brother's former conspirators in exchange for dropping the charges against James in episode 4x01 "American Alien".
A tip from Manchester leads him and Kara to a recently emptied shipping container and Kara has to stop him from beating answers out of a port employee in episode 4x07 "Rather the Fallen Angel".
A strange duplicate of Supergirl walks out of the snow and encounters a group of Kasnian soldiers in episode 3x23 "Battles Lost and Won". After another training drill, the alternate Supergirl collapses and releases a burst of purple energy while being revived in episode 4x11 "Blood Memory". The Kasnian Minister of Defense calls Lex and asks for his help with their new acquisition in episode 4x16 "The House of L".
Pro- and anti-alien protestors are lined up outside the White House while President Marsden meets with Supergirl in episode 4x02 "Fallout". People protesting the repeal of the Alien Amnesty Act gather in front of the White House in episode 4x17 "All About Eve".
Alex, J'onn, and Manchester Black stop a pair of mind-controlled aliens from attacking a police station but when Kara joins in the fight her suit starts to fail exposing her to more Kryptonite in episode 4x04 "Ahimsa".
Kara confronts Manchester and Hat outside the jail and finds them backed up by Menagerie and one of the Morae in episode 4x13 "What's So Funny About Truth, Justice, and the American Way?".
Ben Lockwood arrives home and his son shows him a news report about the manifesto. Later, he sits with his family for Thanksgiving dinner in episode 4x06 "Call to Action". Ben Lockwood returns home to find Manchester waiting for him posing as an old college friend for his wife in episode 4x08 "Bunker Hill".
Kara and her Super Friends defend the Project Claymore launch site from the Elite and Alex shows up to lend an unexpected hand against orders in episode 4x13 "What's So Funny About Truth, Justice, and the American Way?".
All of James's friends gather at the hospital while he is in surgery including his sister Kelly in episode 4x15 "O Brother, Where Art Thou?". Kara visits Alex and James as Supergirl to warn them about Lex's escape in episode 4x16 "The House of L". Kelly catches James as he is leaving the hospital and says he might want to see someone about his trauma in episode 4x17 "All About Eve".
Kara, Lena, and Alex search Eve's secret lab, discover some clues, and are attacked by a failed experiment in episode 4x17 "All About Eve".