During the early days of Noah Wyle's time on ER ... getting to go back to high school." Wyle explains, "Knowing what I know now, it was like picking up an instrument that I haven't played in ...

Take, for instance, Robby (Noah Wyle) and Collins (Tracy Ifeachor ... a girl that he dated for a while and he kind of ends up liking the kid more than he likes the mom. And so he is got this ...