: The Doctor discovers troglodytes working in a nebula's core full of caves, overseen by men who use "fumigation" as a means of control.
: You can find this classic episode on streaming platforms like Apple TV or Tubi . [S15E18] Underworld 2
Reports on the episode's quality are mixed, often highlighting the ambitious story vs. the limited production budget of the time: : The Doctor discovers troglodytes working in a
: The society is controlled by "The Seers," who value radioactive energy over human life. the limited production budget of the time: :
: Critics generally find Part Two to be the weakest segment, describing it as "extremely dull" with roughly 20 minutes of "walking around and gas".
: The story is loosely based on the Greek legend of Jason and the Argonauts , specifically their quest for the Golden Fleece, with "Underworld" serving as a sci-fi retelling of the journey to Colchis. Critical Reception & Production