[s15e18] Underworld 2 -

: This is distinct from the 2006 film Underworld: Evolution , which is also sometimes colloquially called " Underworld 2 ". "Doctor Who" Underworld: Part Two (TV Episode 1978) - IMDb

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 [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 is distinct from the 2006 film