As the Doctor's trial continues, evidence is presented showing his most recent adventure, one where he faces an old adversary, Sil. As a scientist conducts his unethical experiments to prolong the life of Sil's boss Kiv, the Doctor's memories of the events begins to return and an unpleasant surprise awaits him.
| Writing | Philip Martin | Writer |
| Directing | Ron Jones | Director |
| Writing | Eric Saward | Script Editor |
| Production | John Nathan-Turner | Producer |
| Costume & Make-Up | John Hearne | Costume Design |
| Art | Andrew Howe-Davies | Production Design |
| Sound | Richard Hartley | Original Music Composer |
| Lighting | Colin Widgery | Lighting Director |
| Sound | Mike Johnstone | Sound |
| Costume & Make-Up | Dorka Nieradzik | Makeup Artist |
| Production | Karen Jones | Production Assistant |
| Production | Kevan Van Thompson | Production Manager |
| Crew | Dick Mills | Special Sound Effects |
| Camera | Alec Wheal | Camera Supervisor |
| Lighting | Don Babbage | Lighting Director |
| Sound | Brian Clark | Sound |
| Visual Effects | Danny Popkin | Visual Effects |
| Editing | Hugh Parson | Editor |
| Visual Effects | Peter Wragg | Visual Effects |
