Corinna Stark replaces the wounded Prof and provides the team with new winter-weight uniforms. They need a doctor for Prof But a thunderstorm has washed out the bridge: they’re trapped on the mountain. At the castle, Algernon Stark revives and in the ensuing battle he and Prof are separated from the team and encounter cultists who worship a hooded figure, Chu, who kills Algernon. The Challs join Prof and all but Red are captured by the cultists, as Chu explains he is an alien who enslaved the locals. Chu escapes the Challs but Prof is missing.