Space:1999 Earthbound

The "Earthbound" episode of *Space: 1999* is the episode of the first season. In this episode, a vessel of aliens bound for Earth lands on the Moon. They are greeted as friends by the inhabitants of Moonbase Alpha, except for Commissioner Simmonds, who sees their vessel as a potential way to return to Earth⁵. The episode features notable guest appearances, including Christopher Lee as Captain Zantor⁴. The storyline explores themes of trust, survival, and the moral dilemmas faced by the Moonbase Alpha crew as they navigate their unexpected journey through space⁴.