With the experiment at an end, the Doctor begins to suspect the key to rescuing Jamie, Victoria and Kemel from the Daleks lies with Terrall.
Quest roles:
John Scott Martin(Dalek Operator), Peter Hawkins(Dalek (voice)), Brigit Forsyth(Ruth Maxtible), Sonny Caldinez(Sskel), Marius Goring(Theodore Maxtible)