Synopsis by Hal Erickson
Future "Man From U.N.C.L.E." Robert Vaughn guest stars as Jim Darling, a handsome, self-made millionaire -- and the former boyfriend of Laura Petrie (Mary Tyler Moore). After a chance meeting with Darling, Rob (Dick Van Dyke) is not only jealous, but depressed, convincing himself that Laura could have done better for herself by accepting Jim's long-ago marriage proposal. Nor can Rob simply dismiss Mr. Darling's presence -- it turns out that Laura's ex is a potential sponsor for "The Alan Brady Show."