The Doctor and Harry head to the Kaled city to alert the authorities to Davros' plans while Sarah Jane and Sevrin are forced to work on the completion of the Thals' rocket.
Quest roles:
John Scott Martin(Kriz), Roy Skelton(Chedaki), Michael Wisher(Ranjit (voice, uncredited)), Max Faulkner(Corporal Adams), Hilary Minster(Thal Soldier), Guy Siner(Ravon), Stephen Yardley(Sevrin), James Garbutt(Ronson), Tom Georgeson(Kavell), Ivor Roberts(Mogran), Michael Lynch(Thal Politician), Cy Town(Haemovore (uncredited)), Peter Miles(Nyder), Richard Reeves(Kaled Leader), Keith Ashley(Zygon)