6x03: My Kingdom for a Cat
5x10: Night Fever
5x09: Big Bother
5x07: Fear and Clothing
5x06: Brain Drain
5x05: Nothing to Hide
5x04: Cassie Come Home
5x02: Illegal Aliens
5x01: The Foresight Saga
4x10: Time and Time Again
4x09: The Family Way
4x08: The Consultant
4x06: The Mayor of Northolt
4x05: Space Virus
4x04: It's All in the Mind
4x03: Taking the Credit
4x02: The Living Dead
4x01: A Sporting Chance