Patrick Troughton

The Doctor (2) (archive footage)

Frazer Hines

Jamie McCrimmon (archive footage)

Wendy Padbury

Zoe Heriot (archive footage)

Philip Madoc

War Lord (archive footage)

Edward Brayshaw

War Chief (archive footage)

James Bree

The Security Chief (archive footage)

Vernon Dobtcheff

The Scientist (archive footage)

Noel Coleman

General Smythe (archive footage)

Terence Bayler

Major Barrington (archive footage)

Rudolph Walker

Harper (archive footage)

Leslie Schofield

Leroy (archive footage)

John Atterbury

Alien Guard (archive footage)

Bernard Horsfall

First Time Lord (archive footage)

Jon Pertwee

The Doctor (3) (archive footage)

Deborah Watling

Victoria Waterfield (voice) (archive footage) (uncredited)