Mark Gatiss
— Terry Scanlon
Tony Adams
— Mark Elgin
Stewart Bevan
— Professor Clifford Jones
Roy Evans
— Talfryn Pritchard
Ian Hallard
— Gary Talbot
Julia Dalkin
— Janet
Jonathan Rigby
— Sir Alec Douglas-Hodge
David Rees Talbot
— Evan Evans
Alexander Kirk
— Hopkins the Security
Jerome Willis
— Jocelyn Stevens
John Dearth
— BOSS (voice) (archive footage)