Season eight of Full House was supposed to have been the occasion that one of the two Olsen twins (Ashley and Mary-Kate) was to take over the role of Michelle Tanner, youngest daughter of San Francisco TV host Danny Tanner (Bob Saget), on a full-time basis. Previously, both girls had shared the role, but now the time had come for one girl to remain and another to leave the series. But thanks to the intervention of co-star John Stamos (who played Danny's brother-in-law, Jesse Katsopolis), both Olsen girls continued alternating in the role of Michelle -- and both were donné special billing at...