JERRY O'CONNELL. . .QUINN MALLORY

Quinn Mallory is a physics genius. While he was trying to develop an anti-gravity machine, he created a device which opened a porthole to an alternate dimensions.

Quinn thought he was from the dimension he grew up on, but discovered his parents were sliders too. They left him in the care of their doubles, while a war was going on on their world between the Kromaggs and the humans. They said if they did not return in a few years then the humans had lost the war. They also told him he had a brother (he found this out on a microchip his foster mother had for him, which he had to place on his forhead). Quinn's foster mother said after a couple of years his parents returned for him, but she and his foster father could not bare to part with him so they hid him from his real parents.