George Clooney goes dark for a debut and breaks the internet! Some miss the silver fox, others say ER George is back. Either ...

The medical procedural drama premiered in 1994 on NBC and ran for a staggering 15 seasons. See where the star-studded cast is ...

Granitz/WireImage; Jamie McCarthy/Getty George Clooney and his hair are making waves ... he ended up cutting his shoulder-length mane into a cropped cut for ER, similar to the style he has now.