Deep space, 5000AD. An Earth supply shuttle is infected by a strange sentient space-borne virus, which quickly spreads to the crew of the refuelling 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?

Doctor Who (1963) Season 15 Episodes...

• s15e01 - Horror of Fang Rock (1)
• s15e02 - Horror of Fang Rock (2)
• s15e03 - Horror of Fang Rock (3)
• s15e04 - Horror of Fang Rock (4)
• s15e05 - The Invisible Enemy (1)
• s15e06 - The Invisible Enemy (2)
• s15e07 - The Invisible Enemy (3)
• s15e08 - The Invisible Enemy (4)
• s15e09 - Image of the Fendahl (1)
• s15e10 - Image of the Fendahl (2)
• s15e11 - Image of the Fendahl (3)
• s15e12 - Image of the Fendahl (4)
• s15e13 - The Sun Makers (1)
• s15e14 - The Sun Makers (2)
• s15e15 - The Sun Makers (3)
• s15e16 - The Sun Makers (4)
• s15e17 - Underworld (1)
• s15e18 - Underworld (2)
• s15e19 - Underworld (3)
• s15e20 - Underworld (4)
• s15e21 - The Invasion of Time (1)
• s15e22 - The Invasion of Time (2)
• s15e23 - The Invasion of Time (3)
• s15e24 - The Invasion of Time (4)
• s15e25 - The Invasion of Time (5)
• s15e26 - The Invasion of Time (6)

Doctor Who (1963) Show Summary

Doctor Who is the longest-running science fiction TV series in history, airing initially from 1963 to 1989. Doctor Who is about ideas. It pioneered sophisticated mixed-level storytelling. Its format was the key to its longevity: the Doctor, a mysterious traveller in space and time, travels in his ship, the TARDIS. The TARDIS can take him and his companions anywhere in time and space. Inevitably he finds evil at work wherever he goes...