About Doctor Who Season 0, Episode 2 :

Gallifrey, planet of the Time Lords. The Death Zone, where the ancient Gallifreyans once staged gladiatorial games between alien races from throughout the universe, has been reactivated. No less than three of the Doctor's former incarnations and several of his companions are brought here. But why? And who is the Player in the Game of Rassilon? Guest Stars: David Tennant, Billie Piper, Jason Mohammad, Penelope Wilton, Camille Coduri, Noel Clarke, Daniel Evans, Adam Garcia, Sean Gilder, Chu Omambala, Anita Briem, Sian McDowall, Paul Anderson, Cathy Murphy, Seán Carlsen, Sagar Arya, Lachele Carl,