Mysteron Alert! (short story)

Mysteron Alert! was a short story printed in TV Century 21 that contained elements from the Doctor Who universe. Framed as the front page of an in-universe periodical, the titular article made reference to the Captain Scarlet comic story Spectrum News Flash: Scarlet in Pursuit of Mysteron Agent, which was a crossover with the DWU.

Summary
On Tuesday at 11:36AM, emergency sirens sound as Colonel White places Cloudbase on maximum alert status due to Mysteron agent Tansi Trefoil, who was previously believed deceased, awaking again and subsequently evading detection on the aircraft carrier. TV 21 offers its belief that Trefoil retained the power of retro-metabolism and, all the while, Spectrum agents remain vigilant and Cloudbase's security is clamped down in an effort to locate Trefoil.

Elsewhere, the World Intelligence Network chief Shane Weston confirms that their "top secret internal publication" Joe 90 will not be merging with TV 21 as previously rumoured. During later questioning, Weston is confronted with the allegation that the 90 project involves the son of a British scientist, but he refuses to comment.

Characters

 * Shane Weston
 * Colonel White
 * Captain Scarlet
 * Captain Blue
 * Captain Ochre
 * Lieutenant Green
 * Joe 90

Worldbuilding

 * Tansi Trefoil was a US athlete prior to her Mysteronisation.
 * TV 21 compares Trefoil to Captain Scarlet as they have both retained the Mysteron power of retro-metabolism.

Story notes

 * This story is another crossover with Captain Scarlet and the Mysterons and Joe 90. Despite the existence of previous Joe 90 crossovers, this story marked the sole appearance of the title character in a Doctor Who universe story.

Continuity

 * Tansi Trefoil's attempt to destroy the Unity City Games was foiled by Captain Scarlet and she was brought to the Cloudbase medical centre for examination before reviving and escaping. (COMIC: Spectrum News Flash: Scarlet in Pursuit of Mysteron Agent)