The Doctor descends into the Primitive city to try and find Jo while the colonists receive a visit from the Adjudicator.
Quest roles:
John Ringham(Tlotoxl), Bernard Kay(Inspector Crossland), Roy Skelton(Daleks (voice)), Pat Gorman(Soldier), Roger Delgado(The Master), Helen Worth(Mary Ashe), Morris Perry(Dent), Tony Caunter(Jackson), John Tordoff(Alec Leeson), Norman Atkyns(Rear Admiral), Roy Heymann(Gotal), Nicholas Pennell(Winton)