Lyle is a disappointment, and when his parents meddle in his life and their plan backfires, he must deal with the aftermath. Then, Marcia takes her stepdaughter to her grandmother’s…

While Niko races against the clock to save her ship and crew, she remembers the first time she met Cas. Sasha fears his mental state is deteriorating.

Oliver tries to track down Thea in Corto Maltese as Diggle searches for a missing field operative. Meanwhile, Felicity adapts to her new job.

When the passengers on a commuter train all die instantly of massive power loss, the team realizes that a time traveler is responsible… and that it may be impossible to…