The past characters i would like to return to 24 if it goes beyond legacy
Mike Novick
Aaron Pierce
Martha Logan
Wayne Palmer
Olivia Taylor
Haven't you watched what happened to Wayne in season 6 episode 18? Then you would know why he can't come back.
Mike Novick I agree about. I miss that character so much, he was one of the best parts of the early seasons. Very complex, neither always good or always evil.