Guest Stars Nicholas Courtney as Alistair Gordon Lethbridge-Stewart Jeremy King as Yeti Jack Watling as Professor Travers Tina Parker as Anne Travers Jack Woolgar as Staff Sergeant Arnold Derek Pollitt as Driver Evans Ralph Watson as Captain Knight Jon Rollason as Harold Chorley Richardson Morgan as Corporal Blake Rod Beacham as Corporal Lane Stephen Whittaker as Craftsman Weams
