Watch the complete story of The Invisible Enemy - a Fourth Doctor adventure from 1977. Subscribe to Doctor Who: Classic for more full episodes: https://bbc.in/DWClassicSubscribe
While responding to a mayday from a refuelling station on Saturn's largest moon, the TARDIS passes through a mysterious cloud. Leela, sensing a malevolent presence, is immediately on edge. The source of the threat turns out to be an intelligent space virus, and soon the Doctor is infected. With the Time Lord incapacitated, Leela's only hope lies in a nearby medical satellite. There, help comes in the unlikely coupling of eccentric scientist, Professor Marius and his dog-shaped computer called K-9...
First Broadcast between the 1st - 22nd October 1977
Starring Tom Baker as the Fourth Doctor alongside Louise Jameson (Leela) and John Leeson (K-9)
CHAPTERS:
00:00:00 Episode 1
00:23:09 Episode 2
00:48:23 Episode 3
01:11:39 Episode 4
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Compilations: https://bbc.in/DWCompilations
Regenerations: https://bbc.in/DWRegenerations
Title Sequences: https://bbc.in/DWTitleSequences
New to Who: https://bbc.in/DWNewToWho
Official Podcast: https://bbc.in/DWOfficialPodcast
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