Underworld 2: [s15e18]

: The society is controlled by "The Seers," who value radioactive energy over human life.

Reports on the episode's quality are mixed, often highlighting the ambitious story vs. the limited production budget of the time:

: 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 [S15E18] Underworld 2

: The Doctor discovers troglodytes working in a nebula's core full of caves, overseen by men who use "fumigation" as a means of control.

: This serial is notorious for its heavy use of Color Space Overlay (CSO) , a primitive green-screen technique, to create the cave settings. Reviewers from IMDb note that while the lasers and some CSO effects work, others look "simply awful". : The society is controlled by "The Seers,"

: You can find this classic episode on streaming platforms like Apple TV or Tubi .

The code refers to Part Two of the 1978 Doctor Who serial titled " Underworld ". This episode is the 18th in the show's 15th season and features the Fourth Doctor, played by Tom Baker. Plot Overview Critical Reception & Production : The Doctor discovers

: Critics generally find Part Two to be the weakest segment, describing it as "extremely dull" with roughly 20 minutes of "walking around and gas".