It's bad news for the Keatons when Uncle Rob arrives for a visit and announces that he and his wife, Maureen, have split up. News of Robert and Maureen's separation throws the whole Keaton family into an emotional tailspin, despite Robert's insistence that the decision was a mutual one and long overdue. Having always looked up to his responsible and successful older brother as a role model, Steven refuses to believe that Rob's 25-year marriage is really over. Rob, in turn, is dismayed about upsetting the family, but also disappointed by their lack of support. (thetvdb.com)