: The R1C is running out of power and its crew has been regenerating for centuries to survive. The episode concludes as the ship heads toward a nebula where a new planet is forming. Viewing & Production Details

: Stars Tom Baker as the Doctor and Louise Jameson as Leela.

: The crew of the Minyan ship R1C , led by Captain Jackson, is searching for the P7E , a lost colony ship containing their race's genetic banks.

The episode (Season 15, Episode 17) of Classic Doctor Who originally aired on January 7, 1978. In this episode, the Fourth Doctor and Leela land the TARDIS on a spaceship at the edge of the known universe, where they encounter the survivors of the planet Minyos on a 100,000-year quest. Episode Summary

: This story is notable for its heavy use of early blue-screen technology (Chroma Key) to create the vast, cavernous underground settings. "Doctor Who" Underworld: Part One (TV Episode 1978) - IMDb

: This episode is available to stream on platforms including BritBox and YouTube TV .