Tom Baker

The Doctor

Lalla Ward

Romana (voice)

David Brierly

K9 (archive footage) (voice)

Christopher Neame

Skagra (voice)

Daniel Hill

Chris Parsons (voice)

Denis Carey

Professor Chronotis (archive footage)

Victoria Burgoyne

Clare Keightley (voice)

Gerald Campion

Wilkin (archive footage)

Shirley Dixon

The Ship (voice)

Derek Pollitt

Dr. Caldera (archive footage)

James Coombes

The Krargs (voice)

John Hallet

Police Constable

David Strong

Man in Car (archive footage)

James Muir

Fisherman (archive footage)

Derek Suthern

Krarg

Barnaby Edwards

Krarg

Tim Bentinck

The Doctor (body double)

Toby Hadoke

Continuity Announcer (voice)