The singing patient is George Clooney's aunt, singer/actress Rosemary Clooney. Her son, Miguel Ferrer, appeared in the pilot episode.
Rick Rossovich was in Top Gun (1986) with Anthony Edwards.
Rick Rossovich appeared in Roxanne (1987), a modern-day take on Cyrano de Bergerac. Guest star Rosemary Clooney was married to José Ferrer, who played Cyrano.