The Doctor fails to prevent the Thals from destroying the Kaled city but they don't have long to enjoy their victory before the Daleks attack.
Quest roles:
John Scott Martin(Nucleus), Dennis Chinnery(Sylvest), Terry Walsh(Doran (uncredited)), Roy Skelton(Dalek (voice)), Michael Wisher(Daleks (voice)), Stephen Yardley(Arak), James Garbutt(Ronson), Tom Georgeson(Detective Inspector), Michael Lynch(Thal Politician), Harriet Philpin(Bettan), Cy Town(Dalek Operator), Peter Miles(Nyder), Keith Ashley(Zygon)