Tom Baker

The Doctor

Mary Tamm

Romana

John Leeson

K-9 (voice)

John Woodvine

Marshal

Lalla Ward

Princess Astra

Davyd Harries

Shapp

Ian Saynor

Merak

Ian Liston

'Hero'

Susan Skipper

'Heroine'

John Cannon

Guard

Iain Armstrong

Technician

Pat Gorman

Pilot

Harry Fielder

Guard

William Squire

The Shadow

Barry Jackson

Drax

Michael Hayes