Garfield Wilson

Malcolm Merlyn returns. Oliver rallies his team as Slade's soldiers attack the city. Felicity gets a call from S.T.A.R. Labs with game-changing news and Thea comes face-to-face with her father – Malcolm Merlyn (recurring guest star John Barrowman).

After Slade threatens to take away everything Oliver loves, Oliver decides the fastest way to stop further bloodshed is to surrender to his enemy. Knowing that surrender will surely lead to Oliver's death, Diggle and Felicity go to extreme measures to keep Oliver from confronting Slade. Meanwhile, Thea considers leaving town, and Laurel resumes her crusade against Sebastian Blood. Finally, Slade unleashes his assault on Starling City.

Belle attempts to use the blade to get her husband to tell her where the Snow Queen is hiding; Belle goes to Arendelle to seek out Grand Pabbie's help in recovering her lost memories.

Dylan and Rev Bem help a peaceful society stand up to their would-be slavers. They have to be careful, though, because they have a genetic memory, so if Dylan teaches them to kill, their kids will be born with that knowledge.