Graham Kerr went to rehab and his show was never the same. He was always tanked on his original show, it would have been hard not to notice as he downed glass after glass on camera. But boy was he funny.
Julia Child was amazing, my mother used to watch all these cooking shows when I was a kid. Julia would do some pretty amazing food mistakes, like hitting a chicken with a cleaver and it launched across the set. The cameraman was laughing so hard the camera was shaking. She always stayed composed, think a few sips of wine before and during filming helped a bit.