Tom Baker as The Doctor

Louise Jameson as Leela

John Leeson as K-9 Mk. I (voice)

James Maxwell as Jackson

Alan Lake as Herrick

Jonathan Newth as Orfe

Imogen Bickford-Smith as Tala

Christine Pollon as Voice of the Oracle

James Marcus as Rask

Godfrey James as Tarn

Jimmy Gardner as Idmon

Norman Tipton as Idas

Jay Neill as Klimt

Frank Jarvis as Ankh

Richard Shaw as Lakh

Stacey Tendeter as Naia