Michael Tiernan

Clark falls headlong into a cave, where he finds a beautiful girl and a wall inscription with the key to his origins.

Oliver and Barry hide Kendra and Carter in a remote location while they try to figure out how to defeat Vandal Savage. Felicity, Thea, Diggle and Laurel work to come up with a weapon to destroy Vandal.

In its second major crossover event with Arrow, Vandal Savage (guest star CASPER CRUMP) arrives in Central City and sets his sights on Kendra Saunders. After Vandal attacks Kendra and Cisco, they turn to Barry for help. Realizing how dangerous Vandal is, Barry takes Kendra to Star City and asks Oliver and the team to hide her until he can figure out how to stop Vandal. However, things quickly go from bad to worse when a man with wings AKA Hawkman (guest star FALK HENTSCHEL) shows up and flies off with Kendra. Meanwhile, Harrison develops a serum to make Barry run faster and asks Jay to test it out.

To survive in a hostile environment, a scientist combines his DNA with that from creatures from Venus.

Bennett almost loses his life when the Mountie he is accompanying to Fort Walsh turns out to be a member of the Connaught Gang.