Penny wakes up in a cell next to Marina and learns that Daniel Stoppard had them kidnapped so he can send them back to their original timeline in episode 4x06 "A Timeline and Place".
Julia and Quentin are searching for clues in some recently uncovered Egyptian artifacts when they are unexpectedly joined by the monster in episode 4x06 "A Timeline and Place".
Wild Dog chases a criminal from a rooftop but accidentally falls off in episode 5x02 "The Recruits".
Diggle leads an assault to recover a nuclear detonator but is betrayed by his own commander in episode 5x02 "The Recruits".
A group of corrupt cops kill a pair of drug dealers and are attacked in turn by Church in episode 5x01 "Legacy".
Oliver chases a low-level dealer across a rooftop to gain information on his supplier while the team watches from the base in episode 5x03 "A Matter of Trust".
Oliver heads to a reported break-in only to find the call was a fake so Billy Malone could pass him information in episode 5x03 "A Matter of Trust".
Dinah and Oliver head to threaten a business owner as a favor fro the Bratva in episode 5x12 "Bratva".
Talia has Oliver take out a few low-level drug dealers as part of his training in episode 5x12 "Bratva".
Diggle and Oliver search the basement of the church for General Walker but find that the General already knew they were coming in episode 5x12 "Bratva".
Curtis and Rene find a surviving Triad member and ask him what the three criminals are searching for in episode 5x14 "The Sin-Eater".
Oliver finds Anatoly resting in a hospital bed after being beaten up in episode 5x12 "Bratva". Oliver tries to get Anatoly out of the hospital when his life is threatened in episode 5x14 "The Sin-Eater". Anatoly calls for a trial to avoid being killed by Viktor in episode 5x15 "Fighting Fire with Fire".
Diggle visits his drug dealer's lab to get more supply in episode 6x06 "Promises Kept".
Slade tries to convince his son and the other Jackals that he wants to be one of them in episode 6x06 "Promises Kept".
Blaine talks with his father while Don E stands on the rooftop creating the miracle of snowing brains in episode 4x12 "You've Got to Hide Your Liv Away".
Chase escorts Mama Leone down into the zombie freezer to serve her sentence in episode 4x05 "Goon Struck". Chase oversees Curtis's execution but puts it on hold when he hears that Renegade has surrendered in episode 4x12 "You've Got to Hide Your Liv Away". Liv is held at Fillmore Graves before her execution and Lambert interrogates her for information on the underground in episode 4x13 "And He Shall Be a Good Man". Appears in 2 more episodes.
A woman is shopping from an anti-zombie cashier when a pair of zombies are seen outside attacking a human in episode 5x01 "Thug Death". A news reporter talks about the attack being a hoax and tries to get a statement from Major in episode 5x02 "Dead Lift".
The news records the three people who took credit for the fake video being hauled into the police station in episode 5x02 "Dead Lift".
Dolly Durkins and her goons ambush and murder a Fillmore Graves lieutenant and decide to go after Enzo Lambert next in episode 5x13 "All's Well That Ends Well".
Sara and Amaya chase the vigilante Felicity Smoak through a building and capture her for Damien Darhk in episode 2x16 "Doomworld".
Mick returns to Snart after the Legends leave him behind in episode 2x16 "Doomworld".