Doctor Who: Nightmare of Eden, Episode 2 (1979)

In the second episode of the four-part story "Nightmare of Eden," the Doctor (Tom Baker) encounters danger in the unstable matter zones created by a collision in hyperspace of two space cruisers, the Empress and the Hecate. In addition to tracking down dozens of bizarre animals called Mandrels who have escaped from an electronic zoo, the Doctor is also threatened by the unchecked activities of two bands of drug smugglers. Originally telecast December 1, 1979, "Nightmare of Eden, Episode 2" was written by Bob Baker and codirected by Alan Bromly and (uncredited) Graham Williams. ~ Hal Erickson, All Movie Guide