The Flash
Portal Warehouse (control room)
Oliver goes to the control room while posing as his alternate self to disable the powers dampener in episode 4x08 “Crisis on Earth-X, Part 3”.
Former BC Hydro Operations Centre.
Oliver goes to the control room while posing as his alternate self to disable the powers dampener in episode 4x08 “Crisis on Earth-X, Part 3”.
Penny is filing books in the Underworld Library when he hears the voices of the rest of the gang in episode 3x09 “All That Josh”. Penny gets invited to a book club, argues with Sylvia, cons his way into a way out of the Underworld, and has a nice talk with Hades in episode 3x10 “The Art of the Deal”. Christopher Plover leads Alice to the revisions room and she steals the manuscripts for her and her friends in episode 4x04 “Marry Fuck Kill”.
Oliver and Diggle search for clues outside an abandoned chemical plant in episode 4x21 “Monument Point”.
Source: What's Filming
Felicity and her father work to stop the nuclear missiles launched by Darhk in episode 4x21 “Monument Point”.
Source: Sarah W — Twitter
A team runs the security for the party and subsequent search for Sophie from the command center in pilot episode.