The Doctor begins to investigate the mysteriously wealthy planet Zanak. Mentiads, a deranged Captain, strange omens, miraculous mines – what does it all mean? And what does it have to do with the Key to Time?
Quest roles:
Bruce Purchase(Captain), Ralph Michael(Balaton), David Warwick(Kimus), Primi Townsend(Mula), Bernard Finch(Mentiad), Adam Kurakin(Guard), Rosalind Lloyd(Nurse), Andrew Robertson(Mr. Fibuli)