The Doctor visits his old Time Lord friend Chronotis in Cambridge, 1979. But the ruthless Skagra has also arrived to retrieve a book that will help unlock one of the Time Lords' greatest secrets: what is Shada? Filming for this story was never finished, and in this version the unfilmed material is completed via animation.
| Sound | Mark Ayres | Music |
| Costume & Make-Up | Joan Stribling | Makeup Designer |
| Production | Graham Williams | Producer |
| Editing | Tariq Anwar | Editor |
| Directing | Pennant Roberts | Director |
| Camera | Alec Wheal | Camera Supervisor |
| Visual Effects | Mike Tucker | Modeling |
| Writing | Douglas Adams | Writer |
| Costume & Make-Up | Joan Stribling | Hair Designer |
| Writing | Douglas Adams | Script Editor |
| Camera | Peter Tyler | Director of Photography |
| Sound | Keff McCulloch | Original Music Composer |
| Sound | Dudley Simpson | Original Music Composer |
| Production | John Nathan-Turner | Producer |
| Production | Ralph Wilton | Production Assistant |
| Sound | Mark Ayres | Sound |
| Crew | Brian Hodgson | Special Sound Effects |
| Crew | Dick Mills | Special Sound Effects |
| Sound | Ron Blight | Sound |
| Sound | John Hartshorn | Sound |
| Sound | Michael McCarthy | Sound |
| Camera | Fintan Sheehan | Camera Operator |
| Camera | Colin Case | Camera Operator |
| Lighting | Alan Graham | Gaffer |
| Lighting | Dave Scrivens | Gaffer |
| Camera | Sean Sweetman | Grip |
| Camera | Dicky Howett | Camera Supervisor |
| Lighting | Mike Jefferies | Lighting Director |
| Lighting | Martin Kempton | Lighting Director |
| Visual Effects | AnneMarie Walsh | Lead Animator |
| Visual Effects | Rob Ritchie | 3D Animator |
| Crew | Rob Ritchie | Compositor |
| Art | Adrian Salmon | Storyboard Artist |
| Visual Effects | Ana García Sebastiá | Animation |
| Visual Effects | Joanna Hepworth | Animation |
| Visual Effects | Barry Evans | Animation |
| Visual Effects | Shaun Askew | Animation |
| Visual Effects | David Busch | Animation |
| Visual Effects | Robin Brindle | Animation |
| Visual Effects | Linda Kalcov | Animation |
| Visual Effects | Andy Gubba | Animation |
| Visual Effects | Chris Bowles | Animation |
| Visual Effects | Barry Baker | Animation |
| Visual Effects | Jane Davies | Animation |
| Visual Effects | Kate Sullivan | Animation |
| Art | Mike Collins | Storyboard Artist |
| Art | Jez Hall | Storyboard Artist |
| Visual Effects | Dave Havard | Visual Effects Designer |
| Visual Effects | Dave Chapman | Visual Effects |
| Art | Victor Meredith | Production Design |
| Art | Helen MacKenzie | Property Buyer |
| Costume & Make-Up | Rupert Roxburghe-Jarvis | Costume Design |
| Costume & Make-Up | Kim Burns | Makeup Artist |
| Costume & Make-Up | Sinikka Ikaheimo | Makeup Artist |
| Costume & Make-Up | Joan Stribling | Makeup Artist |
| Directing | Charles Norton | Director |
| Production | Charles Norton | Producer |
| Production | James Goss | Producer |
