The Doctor meets a new enemy – the Shadow – who wants the Key to Time. And the Atrian-Zeon war is approaching an awful climax.
Quest roles:
Lalla Ward(Romana II), Pat Gorman(Pilot), John Woodvine(Marshal), Davyd Harries(Shapp), William Squire(The Shadow), Iain Armstrong(Technician), Ian Saynor(Merak)