The Deathday planetoid was an unnamed planetary body with it's own moons and orbiting a red gas giant, at an unknown location in Deep Space. Although the surface was rocky, barren and seemingly devoid of life, the planetoid nonetheless had Earth-like gravity and a breathable atmosphere, capable of supporting human and felis sapiens life. Lister drunkenly piloted Blue Midget back to Red Dwarf. ("Thanks for the Memory", Series II)