Barry has to lean against a fence after outside after fighting Danton Black in the warehouse in episode 1x02 "Fastest Man Alive".
Kendra Saunders (Hawkgirl) watches the black hole in episode 1x23 "Fast Enough".
Captain Singh heads up the negotiation with William Tockman outside the police station in episode 1x07 "Power Outage".
Barry is attacked by Farooq Gibran in the garage of S.T.A.R. Labs in episode 1x07 "Power Outage". Caitlin walks out of the labs under the influence of Grodd in episode 2x07 "Gorilla Warfare". Barry lures Zoom into a trap in episode 2x18 "Versus Zoom". Appears in 2 more episodes.
Barry gives a bouquet of flowers to a couple eating at a cafe in episode 1x08 "Flash vs. Arrow".
The Flash and Reverse-Flash run past a man setting up Christmas lights in episode 1x09 "The Man in the Yellow Suit".
The Flash and the Reverse-Flash stop to talk in the middle of chase in episode 1x09 "The Man in the Yellow Suit".
Mick Rory & Leonard Snart break into a car storage warehouse in episode 1x10 "Revenge of the Rogues".
Caitlin is attacked by Leonard Snart by her car and is captured in episode 1x10 "Revenge of the Rogues".
Oliver and his crew try to stop Damien Darhk from stealing a chemical weapon and they have to be rescued by the Flash in episode 2x08 "Legends of Today".
Patty is heading to her car when she spots the Earth-2 Harrison Wells loading his trunk in episode 2x08 "Legends of Today".
During a nightmare Patty is taken by Zoom while on a date with Barry in episode 2x10 "Potential Energy".
Joe, Caitlin, and Jay watch a news report on the new villain Geomancer calling out The Flash in episode 2x13 "Welcome to Earth-2".
Zoom runs past a cop and gives him a flying demanding Harrison Wells in episode 2x14 "Escape from Earth-2".
Tommy follows his injured father while Quentin questions him on the attack in episode 1x16 "Dead to Rights".
After breaking her out of the police station Oliver gives Helena a ticket out of town in episode 1x17 "The Huntress Returns".
Roy is unloaded from the police van and taken past reporters and into the police station in episode 3x19 "Broken Arrow". Diggle and Laurel sit in front of the police station guarding Jessica Danforth in episode 4x02 "The Candidate".
Sara chases Thea down the stairs at Laurel's building, but Thea manages to hide from her in episode 4x05 "Haunted".
Lance is drinking at a bar when Felicity's mother strikes up a conversation with him in episode 4x06 "Lost Souls".
Laurel, Thea, and Oliver stake out the railgun shipment in episode 4x11 "A.W.O.L.".
Shadowspire soldiers use Alan Chang's eye to break into the A.R.G.U.S. headquarters in episode 4x11 "A.W.O.L.".
Laurel and Diggle attempt to stop the thief but he escapes through the vents in episode 4x12 "Unchained".
Team Arrow arrives at the Palmer Tech loading dock but find their way in blocked by bees in episode 4x17 "Beacon of Hope".
Church is once again confronted by Prometheus about his attacks on the Green Arrow in episode 5x05 "Human Target".
Curtis and Rene chew Diggle out for losing control in the van after interrogating the gun shop owner in episode 5x07 "Vigilante".
Thea joins Oliver in the search for Billy and discusses Oliver's past actions in episode 5x09 "What We Leave Behind". Oliver meets Anatoly on the roof to apologize after the team interrupts the Bratva's first operation in the city in episode 5x18 "Disbanded".