The 39th episode of Gerry Anderson’s space adventure series Space: 1999 airs on British broadcaster ITV, starring Martin Landau, Barbara Bain, and Catherine Schell. 
Upset when Tony Verdeschi blames her for the failure of his latest beer-brewing experiment, lovestruck young crewmember Shermeen Williams runs off to her quarters, where she sees a vision of a seemingly human face. She reports it to Dr. Russell, who initially dismisses it as a nightmare and puts Shermeen back on duty. But when Shermeen sees the face again, it introduces itself as Vindrus, a man trapped in a universe of antimatter, and it promises her a way to bring her closer to Verdeschi. She follows the instructions given to her by Vindrus, even to the point of disabling a crewmate to take his place on a survey of a nearby planet. This is the world where Vindrus and others like him were banished to the universe of antimatter, and where he intends to return. But for someone in the antimatter universe to cross over to the matter universe, someone from the matter unverse must do the opposite – and Shermeen has allowed herself to be lured into that deadly trap.
written by Pip and Jane Baker
directed by Charles Crichton
music by Derek WadsworthCast: Martin Landau (Commander John Koenig), Barbara Bain (Dr. Helena Russell), Catherine Schell (Maya), Tony Anholt (Tony Verdeschi), Lynne Frederick (Shermeen Williams), Stuart Wilson (Vindrus), John Hug (Bill Fraser), Nicholas Campbell (Eddie Collins), Brian Osborne (Mr. Potter)
LogBook entry by Earl Green