Mal found himself some religion of evil in season 7.
Sandy could have played Principal Flutie according to the unaired pilot.
Jack Tripper could have been Buffy's stepfather, had he not been a robot.
Stars of 24 were here too. Roger Stanton was head of the Watchers Council, Wayne Palmer was Sunnydale High's last principal and Secret Service agent Aaron Pierce is the father of a teen who might trying to kill herself in season 7.
Claire Fisher's boyfriend is Xander's best friend Jesse who got turned into a vampire and then grew up to be a prosecutor. But before getting his act straight he was [[The O.C. beating up his faux baby mama in Chino].
Shao Kahn is both The Judge and The Master's henchman, Luke.
Summer is one of the Potentials, at least in Xanders dream.