1x23 | Arrow

: 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".

" Sacrifice " is the high-stakes Season 1 finale of Arrow , delivering a tragic and game-changing conclusion to the show's debut year. The episode focuses on Oliver Queen’s desperate attempt to stop Malcolm Merlyn’s "Undertaking," a plan to level the Glades using a man-made earthquake.

: Detective Lance, with help from Felicity, manages to disarm the first device located under the Merlyn Global building. However, the second device, hidden elsewhere in the Glades, successfully triggers. Arrow 1x23

: In the ensuing chaos, Laurel becomes trapped in her legal aid office. Tommy Merlyn rushes in to save her. He manages to get her to safety but is pinned by falling debris. Oliver arrives to find Tommy dying; the two reconcile their friendship before Tommy passes away, a death that deeply traumatizes Oliver.

: Earlier in the episode, Moira Queen holds a televised press conference where she confesses her involvement in the Undertaking and exposes Malcolm Merlyn's plan to the city. Key Highlights : The episode's destruction of the Glades and

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: Malcolm Merlyn (initially presumed dead after being stabbed by Oliver) and Tommy Merlyn. : Detective Lance, with help from Felicity, manages

: 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.