| Episode credited cast: |
 | Russell Tovey | - | Himself - Narrator (voice) |
| Rest of cast listed alphabetically: |
 | James Corden | - | Himself |
 | James DeHaviland | - | Himself - 2nd Assistant Director |
| Kevin Downing | - | Himself - Teacher |
| Danny Hargreaves | - | Himself - Special Effects Supervisor |
 | Steve Hughes | - | Himself - Director |
| Greg James | - | Himself - Presenter, Radio 1 |
| Roz James | - | Herself - Twins' Mum |
 | Crispin Layfield | - | Himself - Stunt Co-ordinator |
 | Steven Moffat | - | Himself - Head Writer |
| Saul Nassé | - | Himself - Controller, BBC Learning |
| Denise Paul | - | Herself - Producer, Episode 12 |
| Gareth Roberts | - | Himself - Writer |
| Iwan Roberts | - | Himself - Location Manager |
 | Tim Rose | - | Himself - Animatronics Operator |
hd.thomson-multimedia