Dangerous Rendezvous

Concluding from where Crater 101 left of, Spectrum take a chance by commencing a maximum security operation to bodyguard radio communications expert, Doctor Kurnitz, from the Nash Institute of Technologies, up to Cloudbase to send a broadcasted voice message by Colonel White to the Mysterons base on Mars, in an effort to solve their differences, and to end the raging war of nerves between them. But the Mysteron pulsator stolen by Captain Scarlet during the expedition at Crater 101 is used as an explosive charge, to start a chain reaction on-board Cloudbase, which will no doubt utterly destroy the aerial base, and with Scarlet drawn away by Captain Black to prevent him from saving his fellow officers, the world-security organisation known as Spectrum, is condemned to be crippled.

Spectrum prend un risque en mettant en place une opération de sécurité maximale à l'expert en communications radio des gardes du corps, le docteur Kurnitz, du Nash Institute of Technologies.

Voor de eerste keer kan de Aarde de Mysterons oproepen via de vreemde kristallen pulsator die Scarlet, Green en Blue hebben meegenomen uit de maanbasis van de Mysterons.

Tras los eventos de "Cráter 101", los Marcianos amenazan con destruir la Base Nube. Pero Spectrum, aprovechando las propiedades únicas del pulsador recuperado del complejo lunar de los Marcianos, contacta a los alienígenas en un intento de lograr la paz.