The day of the rehearsal dinner, Eric comes to the realization that he could be holding Donna back if he marries her. He attempts to tell her this when the Formans come visit the mobile home Donna picked out. Although he denies having second thoughts, he drops enough hints to make Donna begin to worry about the wedding herself. Meanwhile, Michael makes a very poor first impression on Brooke's mother; Hyde and Fez try to decide who Eric's best man will be.