Space: 1999 Space Brain

*"Space Brain"* is the **20th episode** of *Space: 1999* Season 1, originally aired in **January 1976**. The episode follows Moonbase Alpha as it encounters a **mysterious, massive alien intelligence**—a "Space Brain"—that controls thousands of inhabited worlds. The Alphans receive **indecipherable signals** on their screens, prompting Commander Koenig to send an Eagle to investigate. However, the ship is **compressed into a small asteroid**, and another pilot becomes **possessed** by the alien force. The crew soon realizes that the Moon is on a **collision course** with the Space Brain, and they must find a way to communicate with it before disaster strikes.