The Invisible Enemy (TV story)

Synopsis
A rocket with three men are near complete their mission to Titan Base until a course change puts the rocket in the path of a strange cloud in space. By the timme they have arrived, they have changed and serve a sentient virus which threatens the galaxy. When the TARDIS picks up an emergency message, it flies into the cloud, infecting the Doctor himself. To save himself and others, the Doctor must undertake a dangerous journey.

Plot
to be added

Cast

 * The Doctor - Tom Baker
 * Leela - Louise Jameson
 * Voice of K-9 - John Leeson
 * Lowe - Michael Sheard
 * Safran - Brian Grellis
 * Meeker - Edmund Pegge
 * Silvey - Jay Neill
 * Crewman - Anthony Rowlands
 * Nucleus - John Scott Martin
 * Nucleus Voice - John Leeson
 * Professor Marius - Frederick Jaeger
 * Parsons - Roy Herrick
 * Cruikshank - Roderick Smith
 * Marius' Nurse - Elizabeth Norman
 * Reception Nurse - Nell Curran
 * Opthalmologist - Jim McManus
 * Hedge - Kenneth Waller
 * Medic - Pat Gorman

Crew

 * Assistant Floor Manager - Tony Garrick, Christabel Albery
 * Costumes - Raymond Hughes
 * Designer - Barry Newbery
 * Film Cameraman - Nick Allder
 * Film Editor - Glenn Hyde
 * Incidental Music - Dudley Simpson
 * Make-Up - Maureen Winslade
 * Producer - Graham Williams
 * Production Assistant - Norman Stewart
 * Production Unit Manager - John Nathan-Turner
 * Script Editor - Robert Holmes
 * Special Sounds - Dick Mills
 * Studio Lighting - Brian Clemett
 * Studio Sound - Michael McCarthy
 * Theme Arrangement - Delia Derbyshire
 * Title Music - Ron Grainer
 * Visual Effects - Tony Harding, Ian Scoones

Story Notes

 * This story was listed on the 1970s sound effects LP as "The Enemy Within"
 * This is the story which introduced K-9.
 * This story also re-introduces the 'old' white console room rather than the 'wooden' secondary console room which debuted in The Masque of Mandragora.

Ratings

 * Episode 1: 8.6 Million
 * Episode 2: 7.3 Million
 * Episode 3: 7.5 Million
 * Episode 4: 8.3 Million

Myths
to be added

Location Filming
to be added

Discontinuity, Plot Holes, Errors
to be added

Continuity
to be added

DVD, Video and Other Releases
to be added

Target Novelisations

 * Published in 1979 as 'Doctor Who and the Invisible Enemy' By Terrance Dicks.