8. Invasion!

Complete story — includes the ending

Oliver finds himself back at Queen Manor; both his parents are alive, he is about to be married to Laurel Lance, and Diggle is The Hood. However, it is revealed that he, Diggle, Thea, Sara Lance, and Ray Palmer are all being held unconscious inside pods aboard the Dominator mothership. Meanwhile, Felicity, Curtis, and Cisco Ramon try to hack into the Dominators' mainframe using a piece of their technology. The team recovers a necessary device with the help of the Flash and Supergirl and manages to locate the others. Oliver begins seeing flashes of his former life, as do Sara and Ray. All five captives soon realize that they are inside a shared hallucination of simulated reality. Their escape attempt is blocked by manifestations of Malcolm Merlyn, Deathstroke, Damien Darhk, and their mercenaries. The group defeats all of them, then leaves the dream and awakens inside the ship. Escaping in a shuttle, they are rescued by the Waverider. Ray deduces that the Dominators were gathering information from their minds to help them complete a special "weapon", using the hallucination as a distraction. The team learns that the Dominator mothership is headed toward Earth. Note: This episode continues a crossover event that begins on The Flash season 3 episode 8 and concludes on Legends of Tomorrow season 2 episode 7.