Aside from the improvement in overall quality of storylines (Susans sister leaves her holding the baby, Weaver joins the team and Greenes wife becomes a superbitch) there is a scene seven episodes into the sophomore season of TVs best medical drama when you can actually pinpoint the exact second George Clooney became a star.
Standing in a sodden DJ holding a small boy hes rescued from a flooded storm drain, he simultaneously loosened the female populations collective knicker elastic and rocketed onto casting agents wish-lists. That it led to One Fine Day and Batman And Robin is hardly his fault.