My Brother's Keeper

T4, E19: Quinn is immediately greeted on a new world by college friends who mistake him for his double. The Sliders visit the college, where Quinn's double figures equations on a blackboard. The equations are wrong, though, and when he activates his device, it explodes, damaging his eyes. Quinn and Colin rush to save him, but Quinn is intercepted by security guards... since his eyes will be needed to replace Quinn 2's.