When Clooney and Wyle weren’t saving lives at Cook County General Hospital as Dr. Doug Ross and medical student John Carter ...

Noah Wyle looks back on his time playing Dr. John Carter on 'ER' and his crossover with 'Friends,' revealing to PEOPLE he was ...

During the early days of Noah Wyle's time on ER, he and costar George Clooney also guest-starred in an episode of Friends, making for a very cheeky crossover for the two popular NBC shows.

Elsewhere in the episode, in the aftermath of Doug Driscoll ( Drew Powell ), an impatient man in the waiting room, punching ...

From left: Jennifer Aniston, Courteney Cox, George Clooney and Noah Wyle on 'Friends' in 1996 ...

When Clooney and Wyle weren’t saving lives at Cook County General Hospital as Dr. Doug Ross and medical student John Carter on ER, the two briefly took a break to play doctors on the Friends ...

During the early days of Noah Wyle's time on ER, he and costar George Clooney also guest-starred in an episode of Friends, making for a very cheeky crossover for the two popular NBC shows. In 1995, ...