Peter Davison (Fifth Doctor)
Mark Strickson (Turlough)
Nicholas Briggs (Henry Gaunt)
David Walliams (Quincy Flowers / Ned Cotton)
Jonathan Rigby (Edmund Carteret)
Mark Gatiss (Jasper Jeake)
Jez Fielder (Poltrot / Major Billy Lovemore / Librarian)
David Ryall (Sir Nikolas Valentine)
Steven Wickham (Dr Samuel Holywell)
Julia Deakin (Hannah Fry)