Dynasty – Al Corley was replaced by Jack Coleman
Steven Carrington
I only included this one because to me, this guys look identical, plus Jack Coleman played the badass dad on the first season of Heroes, and I respect that. Original actor Al only lasted for the first season when he was fired, and the transition was handled with a season ending oil explosion that maimed the characters face.
When he woke up and took off his bandages after plastic surgery, he looked like Jack.