Tom Baker

The Doctor

Mary Tamm

Romana

John Leeson

K-9 (Voice)

Peter Jeffrey

Count Grendel

Simon Lack

Zadek

Neville Jason

Prince Reynart

Paul Lavers

Farrah

Lois Baxter

Lamia

Declan Mulholland

Till

Cyril Shaps

Archimandrite

Graham Williams

Producer

Michael Hayes

Director

David Fisher

Writer

Anthony Read

Script Editor

Dudley Simpson

Original Music Composer

Delia Derbyshire

Theme Song Performance