Legion (S08E11)

The aftermath of Doomsday's attack on Chloe and Jimmy's wedding leaves Clark in shock, but before he can search for the kidnapped Chloe, the Persuader (guest star Fraser Aithcheson) appears and attacks him. Rokk (guest star Ryan Kennedy), Imra (guest star Alexz Johnson) and Garth (guest star Calum Worthy) -- also known as the Legion -- step in from the future to help vanquish the Persuader, and the group realizes Brainiac has taken over Chloe once again. Meanwhile, up at the Fortress, Chloe, as Brainiac, informs Davis he is Doomsday and was created to kill "the other Kryptonian" and destroy the world. (Warner Bros. UK)