Harry meets Zoom by a breach and agrees to help him after being shown his daughter in episode 2x09 "Running to Stand Still".
Weeper is walking down an alley when DeVoe tracks him down in episode 4x05 "Girls Night Out".
Evelyn Sharp interrupts a gun deal while dressed as the Black Canary and steals some guns in episode 4x19 "Canary Cry".
Oliver corners Evelyn Sharp after she attacks Alex on his date and learns her identity in episode 4x19 "Canary Cry".
Lambert lets Tucker go and tells him that Brother Love has his support inside Fillmore Graves in episode 4x12 "You've Got to Hide Your Liv Away".
Max parks his car behind a graffiti covered warehouse to check on the money only to find he ended up with the dummy bag in episode 1x10 "Always Forward, Never Back".
Max rides with Sketchy beside the tracks in episode 1x08 "Out".