When the Master steals the Time Lords' secret file on the Doomsday Weapon, they grant the Doctor a temporary reprieve from his exile on Earth to deal with the crisis. He and Jo arrive on the planet Uxarieus and become enmeshed in a struggle between an agrarian colony and a powerful mining corporation.
| Writing | Malcolm Hulke | Writer |
| Directing | Michael E. Briant | Director |
| Writing | Terrance Dicks | Script Editor |
| Production | Barry Letts | Producer |
| Sound | Dudley Simpson | Original Music Composer |
| Camera | Peter Hall | Camera Operator |
| Editing | William Symon | Editor |
| Visual Effects | Bernard Wilkie | Visual Effects |
| Costume & Make-Up | Michael Burdle | Costume Design |
| Costume & Make-Up | Jan Harrison Shell | Makeup Artist |
| Lighting | Ralph Walton | Lighting Director |
| Sound | David Hughes | Sound |
| Sound | Tony Millier | Sound |
| Art | Tim Gleeson | Production Design |
