Classic Who S15 • Serial 2 · (4 episodes) The Invisible Enemy Sets: Doctor Who (1963-1996) Fourth Doctor 2.94/ 5 252 votes Watch on iPlayer Novelisation: "Doctor Who and the Invisible Enemy" TARDIS Wiki Share this page {{ shareFeedback }} Copy link {{ copyFeedback }} Overview Reviews (4) Transcript Quotes (2) Quotes Spoiler warning! “Sometimes my brilliance astonishes even me.” — Fourth Doctor, The Invisible Enemy “That's the trouble with computers. Always think in black and white. No aquamarines, no blues, no imagination.” — Fourth Doctor, The Invisible Enemy Login to track and rate! View Rating Distribution Ratings are from TARDIS Guide members only. Characters Fourth Doctor Leela The Nucleus of The Swarm K9 Mark I Frederick Marius Related Stories: Main Range 189. Revenge of the Swarm Average. Rating: 40% Average rating: ★ 2.76 Listen Listened? 0.013065099716187 DWM Brief Encounters Tautology Complete Completed? 0.0085020065307617 Other adaptations of this story: Target Collection Doctor Who and the Invisible Enemy Average. Rating: 62% Average rating: ★ 3.39 Read Read? 0.0069561004638672 Where to watch The Invisible Enemy: The Collection – Season 15 Blu-Ray Average. Rating: 65% Collected Unowned ⊖Saved to Wishlist ⊕Save to Wishlist K-9 Tales DVD Average. Rating: 59% Collected Unowned ⊖Saved to Wishlist ⊕Save to Wishlist The Invisible Enemy (VHS) Collected Unowned ⊖Saved to Wishlist ⊕Save to Wishlist