Daren A. Herbert

Peter asks Olivia's help in going to the Other Side. Walternate's aid is needed when Walter refuses to help Peter employ the Machine to return to his own timeline. Meanwhile, the threat of the prototype shapeshifters grows and an old enemy returns.

Clark receives a mysterious package containing the crystal that Tess found in the Arctic. When he touches it, it transports him and Lois to the Phantom Zone where they meet Kara.

Tess orchestrates an explosion on a private jet to get Clark to reveal his powers; Davis discovers a surprising way to control the monster within.

Kyle, Josh and Nicole help a pregnant teen with her delivery; Lori and Jesse fight, while Stephen is left alone at home.