Doctor Who
The Invisible Enemy, Part Four
Season 15, Episode 8 · Aired 1977-10-22
Synopsis
In trying to retrieve the clones from inside the Doctor, the alien virus is brought from the microbial world into the macro-world, and it's ready to spawn.
In the series
This episode is part of Doctor Who (1963–) on BBC.
A time-traveling renegade in a police box — regeneration as infinite franchise life.
Key cast
- William Hartnell as The First Doctor
- Patrick Troughton as The Second Doctor
- Jon Pertwee as The Third Doctor