Main content

The Invisible Enemy: Part 4

Doctor Who (1963–1996) Season 15

The Nucleus has escaped the Doctor's body and grown to human size. Its plans to spawn and infect the whole galaxy are nearing fruition. And it looks like K-9 has a new master.

Available now

20 minutes

Last on

Thu 3 Aug 1978 19:00
91Èȱ¬ One

More episodes

Previous

The Invisible Enemy: Part 3Season 15

Next

Image of the Fendahl: Part 1Season 15

See all episodes from Doctor Who (1963–1996)

Clip

Broadcasts

Enter The Whoniverse

Enter The Whoniverse

Every Doctor, every companion, every enemy. Discover the Whoniverse. Only on 91Èȱ¬ iPlayer.