The Doctor is rescued by Gebek, prompting him to try and help the miners, but his advice results in Ettis launching another attack on the armoury.
Quest roles:
Terry Walsh(Doran (uncredited)), Sonny Caldinez(Ssorg), Stuart Fell(Roga), Nick Hobbs(Aggedor), Rex Robinson(Dr. Carter), Donald Gee(Eckersley), Frank Gatliff(Ortron), Ralph Watson(Ben), Graeme Eton(Preba), Ysanne Churchman(Alpha Centauri (voice)), Nina Thomas(Thalira)