James is the elder brother of Brian and Betsy, but, unlike them, he has no mutant powers. Jamie was a racing pilot, and lived over his economic possibilities until he had no further money to spend. Then he turned to illegal activities, being the worse of it the trading of slaves. He got caught by Dr. Croc and bewitched, and when his brother discovered the truth, renounced to save him, leaving him in the hands of his torturers.

Jamie discovered then that he had the capability of altering the reality, which he began to see an composed of bright chords, by breaking, straightening or moving those chords. Then, he escaped, turning Dr. Cros into a small crocodile, but he completely lost his sanity. One of the first things he made was bringing back to life his old nanny, and returning to the Braddocks' place in London. Later, he was convinced by Sat-Tyr-9 to attack his brother's house, killing Brigadier Alysande Stuart. At the end all were defeated and Jamie spent some time in a comatose state.

Lately, Brian has tried an approachment to him, since the bond between the twins could have been the detonant of Jamie's jealousy and so, his further behavior.