UFO: Ordeal (Episode 19)

Following a wild night out with a girl called Sylvia, Foster is receiving a refreshing sauna bath at the SHADO health farm. Drifting into semi-consciousness, he comes to to find he has been abducted by an alien and is on a UFO, which is shot down onto the Moon's surface. He survives but has to be extremely careful how he removes the helmet he is wearing. Clumsy removal would kill him because of the breathing liquid it contains.