Doctor Who: The Invisible Enemy, Episode 3 (1977)
Rent DVD by Mail
Theatrical Release Information | See Details About All Versions
In the third episode of the four-part story "The Invisible Enemy," the miniaturized clones of the Doctor (Tom Baker), Leela (Louise Jameson), and robotic dog K-9 continue their "fantastic journey" through the real Doctor's blood stream, endeavoring to locate and destroy the infectuous space virus called the Swarm. Alas, the virus manages to escape the Doctor's body and grows to full size, the better to replicate itself many times over -- and then to take over the Universe. Written by Bob Baker and David Martin, "The Invisible Enemy, Episode 3" originally aired on October 15, 1977. ~ Hal Erickson, All Movie Guide
Complete Cast:
- Tom Baker - The Doctor
- John Leeson - K-9
- Brian Grellis - Capt. Safran
- Jim McManus - Opthalmologist
- Elizabeth Norman - Marius' Nurse
- John Scott Martin - Nucleus
- Pat Gorman - A Medic
- Louise Jameson - Leela
- Michael Sheard - Supervisor Lowe
- Frederick Jaeger - Prof. Marius
- Roy Herrick - Dr. Parsons
- Roderick Smith - Dr. Cruikshank
- John Leeson - Nucleus
- Director(s):
- Derrick Goodwin
- Writer(s):
- David Martin, Bob Baker
- Closed Captioning:
- Check All Versions
- Subtitles:
- Check All Versions






