Doctor Who: Invisible Enemy
Season 1
Ep 1. Episode 1
- October 1, 1977
Deep space, 5000 AD. An Earth supply shuttle is infected by a strange sentient space-born virus, which quickly spreads to the crew of the refueling station on the moon Titan. Even worse, the Doctor himself falls victim. But why is Leela immune, and what is the virus's ultimate goal?