Elenco - The Zero Imperative
Caroline John
Dr. Elizabeth Shaw
Jon Pertwee
Dr. Jeremiah O'Kane
Sylvester McCoy
Dr. Colin Dove
Colin Baker
Peter Russell
Mark Gatiss
Dr. William Bruffin
Louise Jameson
Patricia Haggard
Sophie Aldred
Public Relations Officer
Linda Lusardi
Louise Bayliss
David Terence
Daniel O'Kane / Eustace O'KaneNicola Fulljames
Dr. Beatrice HearstPatricia Merrick
Dr. Julie Gilchrist
Jonathan Rigby
Cummings
Alexander Kirk
OrderlyDaniel Mills
Ghostly Child Voice
Peter Davison
Patient One