Chloe invites an injured 15-year-old to move in with her. Meanwhile, Clark experiences his first day of work with Lois.

The inhabitants of Atlantis begin to suffer ill effects when the planet’s whale population begins migrating to the island city, bringing an unexpected harbinger of doom.

Shawn and Gus must prove a pathological liar is telling the truth in order to stop an assassination plot.

An experiment gone wrong pulls Samantha Carter into a parallel reality, where she must save Earth from an Ori assault before she will be allowed to return home.