 | Steve Pemberton als Various Characters |
 | Reece Shearsmith als Various Characters |
 | Mark Gatiss als Various Characters |
 | Bruno Langley als Damon |
 | Paul Hays-Marshall als Barbara Dixon |
 | Danielle Tilley als Dahlia |
 | Emily Woof als Lindsay |
 | Alan Morrissey als Johnny |
| Liana O'Cleirigh als Claire |
 | Michael Sheen als Jeremy |
 | David Warner als Dr. Erasmus Pea |
 | Victoria Wood als Queen Mary II |
 | Bernard Hill als King William III |
 | Simon Pegg als Peter Cow |
 | Peter Kay als Simon Pig |
 | Liam Cunningham als Director |
| Rachel Rath als Homunculus |
 | Jeremy Dyson als Hospital orderly (uncredited) |
| Steve Bendelack | Director |
| Peter Bennett-Jones | Executive Producer |
| Greg Brenman | Producer |
| Jeremy Dyson | Executive Producer |
| Mark Gatiss | Executive Producer |
| Ed Guiney | Producer |
| Andrew Lowe | Executive Producer |
| Seamus Mcinerney | Line Producer |
| Steve Pemberton | Executive Producer |
| Rachel Salter | Co-Producer |
| Reece Shearsmith | Executive Producer |
| Joby Talbot | Music |
| Rob Kitzmann | Cinematography |
| Richard Bridgland | Production Design |
| Tony Cranstoun | Editor |
| Yves Barre | Costume Design |
| Andrew Lowe | Executive Producer |
| Reece Shearsmith | Writer |
| Steve Pemberton | Writer |
| Jeremy Dyson | Writer |
| Mark Gatiss | Writer |
