Writer(s): Robert Holmes

Director(s): Derek Martinus

Producer(s): Derrick Sherwin

Episodes: 4

Writer(s): Malcolm Hulke

Director(s): Timothy Combe

Producer(s): Barry Letts

Episodes: 7

Writer(s): David Whitaker | Trevor Ray | Malcolm Hulke

Director(s): Michael Ferguson

Producer(s): Barry Letts

Episodes: 7

Writer(s): Don Houghton

Director(s): Douglas Camfield | Barry Letts

Producer(s): Barry Letts

Episodes: 7