The Invisible Enemy

The Invisible Enemy is the second serial of season fifteen of Doctor Who. First airing in 1977, it details the Doctor being infected by a mysterious space-borne infection.
== Characters ==
* Fourth Doctor - Tom Baker
* Leela - Louise Jameson
rest to be added
== Summary ==
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.
Category:Bob Baker
Category:Dave Martin
Category:Derrick Goodwin
Category:Doctor Who
Category:Science fiction
Category:1977