The Doctor

Susan Foreman

Barbara Wright

Ian Chesterton

Arbitan

Voord / Warrior / Ice Soldier / Aydan

Voord / Ice Soldier / Second Judge

Voord

Altos

Sabetha

Voice of Morpho (voice)

Darrius

Vasor

Ice Soldier / Larn

Ice Soldier / First Judge / Guard

Ice Soldier

Tarron

Senior Judge

Kala

Eyesen

Yartek

Eprin (uncredited)