Captain Blue

Adam Svenson, codenamed Captain Blue, was a member of Spectrum, Earth's primary defence against the Mysterons during the Mysteron War. (COMIC: Traitor Black Gives In!)

Early days of Spectrum
In Pete Tracker's article about Spectrum, published on the front page of TV 21 on 23 September 2067, Blue was mentioned in a list of personnel. (PROSE: SPECTRUM is Green)

A reprieve in the Mysteron War
In 2068, the Mysteron-controlled Captain Black returned to active service with Spectrum, albeit of no memory of his part in the conflict with humanity. Once Black was cleared by Doctor Fawn, Blue took part in a meeting with Colonel White and Captain Scarlet about how best to take advantage of the situation. A plan was formed to destroy the Mysteron City with an electrode cannon mounted on a spaceship, a mission so dangerous only Scarlet was to be aboard due to his indestructibility. Blue helped supervise the testing of the weapon at Fort Johnson and its transportation to Helsinki for lift-off.

After the successful mission, six months past with no sign of Mysteron activity, prompting World President T.J. Younger to disband Spectrum at the final celebration of humanity's victory in the Mysteron War. Svenson and Metcalf, formely Blue and Scarlet respectively, chose to stick together and join the World Space Patrol, where Commander Zero had promised them a new XL craft. They met with Zero in Space City before attending the organisation's training school. They passed far quicker than their classmates, in only a month, were promoted to Colonels and granted command of Fireball XL19. Their first trip was to Sector 58 and the Galaxy Andromeda and was set to last a year.

Sometime later, it became clear that the Mysterons' defeat had been a ruse and that they posed an imminent threat to Earth. Spectrum was reformed, leading to Steve Zodiac and Robert the Robot being sent to speedily retrieve Svenson and Metcalf in the experimental time-space ship T-S. With Scarlet determining that the only place to deal with the Mysterons was their own city, he, Blue and Zodiac flew directly to Mars in the T-S. Scarlet opted to complete the rest of the journey to the Mysteron City alone by Space Bug once there and was able to convince the Mysterons to release their hold over Earth's cities in a confrontation. Back at Cloudbase, Blue was present with Scarlet and White as the Mysterons reiterated their position that they would continue to seek vengeance, with Scarlet mulling over the fact that a surprise attack on their city could never work again. (COMIC: Traitor Gives In!)