William Thomas

The Doctor encounters an enemy from his past when the crew decides to take a holiday; an alien plot is behind the construction of a nuclear power plant in Cardiff.

The team travels on a final desperate mission.

Vera travels to Los Angeles, Calif., to join the Torchwood team as governments across the world swing into action with the new category system; Gwen flies home to the U.K. to save her father and infiltrate the healthcare camp.

Top-secret investigators try to discover why no one on Earth is dying.