Storyline: Cate travels to Japan to get answers about her father and uncovers a shocking secret. Keiko, Lee, and Billy pursue a theory about Titans.

Storyline: Monarch closes in on Cate, Kentaro, and May as they try to track down a key individual. Keiko, Lee, and Billy stumble on a major find.

Storyline: Shaw leads the team on a dangerous mission to Alaska in search of Hiroshi. Keiko, Lee, and Billy present their findings to General Puckett.

Storyline: The team is left stranded in the frozen tundra after a narrow escape. Kentaro reflects on his relationships.

Storyline: Cate's painful memories of G-Day come flooding back as she treks through the ruins of San Francisco with Kentaro and May.

Storyline: Shaw finds an unlikely ally within Monarch as the team has a harrowing run-in. Keiko and Lee grow closer while at a military ball.

Storyline: May finally faces her past. Duvall and Shaw follow traces of Godzilla and Hiroshi.

Storyline: The team goes back to where things all began to confront Shaw. On the brink of collapse, Monarch takes drastic measures.

Storyline: Shaw and May search for Cate and make a startling discovery. Kentaro struggles with his loss.

Storyline: Season finale. The team struggles to find a way out of Axis Mundi. Kentaro and Tim make an unexpected alliance.