A political scandal and a severe case of cold feet threaten Kitty and Robert's highly anticipated wedding day. Meanwhile, Isaac (guest starring Danny Glover) distracts Nora from her romance with Stan (guest starring Chevy Chase) and Holly gets a surprise visit from an old friend (guest starring series executive producer and real life husband Ken Olin). Guest starring are Ken Olin as David Caplan, Danny Glover as Isaac Marshall, Luke Macfarlane as Scotty Wandell, Emily Rose as Lena Branigan, Denis O'Hare as Travis March, Garry Marshall as Major Jack Wiener, Chevy Chase as Stan Harris, Steven Anderson as the officiant, Justine Dorsey as Sophie McCallister, Max Burkholder as Jack McCallister, Alejandro Cardenas as the waiter and Cassius Willis as the agent. "Holy Matrimony" was written by Alison Shapker, Monica Owusu-Breen and Mark B. Perry and directed by Rob Lieberman.