Tom Baker as The Doctor / Xoanon

Louise Jameson as Leela

David Garfield as Neeva

Victor Lucas as Andor

Brendan Price as Tomas

Leslie Schofield as Calib

Colin Thomas as Sole

Lloyd McGuire as Lugo

Tom Kelly as Guard

Brett Forrest as Guard

Rob Edwards as Xoanon (voice)

Pamela Salem as Xoanon (voice)

Anthony Frieze as Xoanon (voice)

Roy Herrick as Xoanon (voice)

Leon Eagles as Jabel

Mike Elles as Gentek

Peter Baldock as Acolyte