: On Lian Yu, the flashbacks conclude with Oliver, Slade Wilson, and Shado successfully stopping Fyers from shooting down a commercial airliner, though the victory is bittersweet as they remain stranded.
: Oliver and Diggle infiltrate Merlyn Global to stop Malcolm. This leads to a brutal rooftop battle between Oliver and Malcolm (the Dark Archer). While Oliver eventually gains the upper hand, Malcolm reveals he has a second earthquake machine as a redundancy. Arrow 1x23
: Malcolm Merlyn (initially presumed dead after being stabbed by Oliver) and Tommy Merlyn. : On Lian Yu, the flashbacks conclude with
: The episode's destruction of the Glades and Tommy’s death set the darker tone for Season 2 and fundamentally shifted Oliver’s mission from "vengeance" to "heroism". : On Lian Yu