Tom Baker

The Doctor

Mary Tamm

Romana

John Leeson

K-9 (voice)

Cyril Luckham

The Guardian

Iain Cuthbertson

Garron

Nigel Plaskitt

Unstoffe

Paul Seed

Graff Vynda-K

Robert Keegan

Sholakh

Timothy Bateson

Binro

Anne Tirard

The Seeker

Prentis Hancock

Shrieve Captain

Robert Holmes

Writer

George Spenton-Foster

Director

Graham Williams

Producer

Anthony Read

Script Editor

Dudley Simpson

Original Music Composer

Delia Derbyshire

Theme Song Performance