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Patrick Troughton
The Doctor

Anneke Wills
Polly

Michael Craze
Ben Jackson

Frazer Hines
Jamie McCrimmon

Colin Gordon
Commandant

Donald Pickering
Blade

Wanda Ventham
Jean Rock

Pauline Collins
Samantha Briggs

Bernard Kay
Inspector Crossland

George Selway
Meadows

Gilly Fraser
Ann Davidson

Victor Winding
Spencer

Christopher Tranchell
Jenkins

Peter Whitaker
Inspector Gascoigne

Barry Wilsher
Heslington

Madalena Nicol
Nurse Pinto