Undercover is the invented title of the second of two Third Doctor comic stories in the TV Comic Holiday Special 1970. Like many pre-Marvel comic strips, it had no title on initial publication. The name gained traction after being used by Jean-Marc Lofficier in The Terrestrial Index and later by John Ainsworth in his then-comprehensive listing of Third Doctor strips in DWCC #4.
- The Brigadier disguises himself as a policeman.
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