What is Captain Scarlet's real name?

Answer 1

Paul Metcalfe.

In the original super-marionation program, Paul Metcalfe was a native of Winchester, Hampshire, England. Moreover, he was a general's son and First Captain, or valedictorian, of his graduating class in the West Point Military Academy. Enlisting in the World Army Air Force Special Forces, or Red Berets, he rose quickly through its ranks to become the youngest full colonel in its history and its top weapons expert. Though he represented the fourth generation of his family to serve in the WAAF, he "retired" into the Spectrum Organization, which gave him the code name Captain Scarlet(he did not mind it, as red was his favorite color anyway), and not much more than a year after he graduated his training, he became virtually indestructible.