Paul Metcalf

Captain Scarlet was a fictional character from the TV series of the same name who could not die.

When Captain Palmer introduced himself, Claire Aldwych said she didn't care if he was Captain Scarlet. (PROSE: The Shadow in the Glass) Rhys Williams (AUDIO: The Dead Line) and later Johnson referred to Jack Harkness as Captain Scarlet. (TV: Children of Earth) The Tenth Doctor once noted that Captain Scarlet was the only person who was indestructible, but quickly added that he didn't think he was real. (PROSE: The Pirate Loop)

Bernice Summerfield referred to the Doctor's Agent Scarlet antidote as Captain Scarlet. (PROSE: Eternity Weeps)

Behind the scenes
Captain Scarlet was the principal character of Captain Scarlet and the Mysterons, a TV series created by Sylvia and Gerry Anderson and produced by Century 21 Productions.
 * While partially obscured by a dialogue balloon, a figure resembling Captain Scarlet is seen sitting with Hulk in the comic story Party Animals. This is further indicated by his uniform being red in the colourised reprint of the story in TIDH 12.
 * The "About the Authors" section of Short Trips: Christmas Around the World refers to writer William Potter as "putting words into the mouths of", among others, Captain Scarlet. This is in reference to New Captain Scarlet, a magazine published by GE Fabbri between October 2005 and February 2006.
 * The Indestructible Man has a number of pastiche versions of Gerry Anderson characters such as Scarlet. The title character, Captain Grant Matthews (Scarlet), was reconstructed by the Myloki (Mysterons) so that he couldn't die. As a member of the organisation PRISM (Spectrum), the colour-coded officer's uniform assigned to him was scarlet. The war with the Myloki is started by Captain Karl Taylor (Captain Black) who is recreated as a Myloki agent.