| Cast | |||
|---|---|---|---|
| Peter Davison |  | Presenter |  |
| Steven Moffat |  | Self | |
| Dr Mike Aitkin |  | (Psychology, King's College London) | |
| Jenna Coleman |  | Self | |
| Andy Pryor CDG |  | Self | |
| David Tennant |  | Self | |
| Howard Burden |  | Self | |
| Nicholas Briggs |  | Self | |
| Derek Ritchie |  | Self | |
| Murray Gold |  | Self | |
| Colin Baker |  | Self | |
| Paul McGann |  | Self | |
| Sylvester McCoy |  | Self | |
| Peter Capaldi |  | Self | |
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