Tom Baker

The Doctor

Louise Jameson

Leela

John Leeson

K-9 Mk. I (voice)

James Maxwell

Jackson

Alan Lake

Herrick

Jonathan Newth

Orfe

Imogen Bickford-Smith

Tala

Christine Pollon

Voice of the Oracle

James Marcus

Rask

Godfrey James

Tarn

Jimmy Gardner

Idmon

Norman Tipton

Idas

Jay Neill

Klimt

Frank Jarvis

Ankh

Richard Shaw

Lakh

Norman Stewart