1x23 | Arrow

: 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

: 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

: 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. : Earlier in the episode, Moira Queen holds

You can find more detailed reviews and community discussions on platforms like the Primetimer Forums or the Arrow Wiki . : 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".

" 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.