Doctor Who: The Invisible Enemy
Science Fiction, Drama, Adventure | 1977-10-22 | United Kingdom
7.2 / 10
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100 min.
A three-man rocket crew are nearly done with their mission to Titan Base until a course change puts the rocket in the path of a strange cloud in space. By the time they arrive, they have come under the control of a sentient virus which threatens the galaxy. When the TARDIS picks up an emergency message, it flies into the cloud, infecting the Doctor. To save himself and others, he must undertake a dangerous journey.
BBC