Doctor Who S15E05 - The Invisible Enemy (1)
Doctor Who (1963)
S15E05 The Invisible Enemy (1)
Episode Overview
In the year 5000 AD, a supply shuttle from Earth encounters a mysterious, sentient virus in deep space. This virus rapidly infects the crew at a refueling station on Titan. The situation becomes critical when the Doctor also becomes infected. Meanwhile, Leela remains inexplicably immune. As the team races against time, they must uncover the virus's true intentions and why Leela is unaffected.