The Switch (comic story)

The Switch was a Zero X comic printed in TV Century 21 in 1970 as part of the 1971 Thunderbirds Annual.

It was partially set in Unity City, first introduced in The Daleks story Duel of the Daleks, thus constituting a crossover with the Doctor Who universe. Notably, The Switch marked the final original TV21 or TV21-adjacent story to contain DWU elements until the beginning of Action 21 eighteen years later in 1988.

Summary
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Characters

 * Paul Travers
 * Greg Martin
 * Ray Pierce
 * President Roberts
 * James Short
 * General Lakeland
 * Ground Controller
 * Ventura's Commander

Worldbuilding

 * Zero X missions can often last for six months without break.
 * Paul Travers refers to himself as "the wanderer returned".
 * Lakeland's wife is a shareholder in Titan Atomic, the company building Zero Z, and will benefit massively if her husband chooses to buy the craft for service.
 * Travers and Short use a military jet to travel to Unity City.

Story notes

 * As well as being the last TV21 or TV21-adjacent story to crossover with Doctor Who universe for almost two decades, The Switch also marked the only such story published for the entirety of the 1970s.

Continuity

 * Although on this occasion it proved to be part of a plan to test the reactions of astronauts, Agent Twenty One of the Universal Secret Service had previously helped to root out genuine corruption under President Roberts. (COMIC: The Space Pirates)