ABC has released the official synopsis and a whole set of promotional images for the January 7th return of Castle, "Significant Others". General Hospital's Jack Wagner guest stars as a pro golfer whose career went down in flames after a nasty divorce, while Nancy Lee Grahn, also a General Hospital star guests as a wealthy divorcee caught in a "War of the Roses"-like struggle with her ex-husband.
- When a powerful divorce attorney who only represented women is murdered, Castle and Beckett are confronted with a plethora of angry ex-husbands, any one of whom could be the murderer.
- Meanwhile, Castle's ex-wife~Darby Stanchfield, Scandal, Meredith, moves into the loft to take care of Alexis while she recovers from Mono.
- To make matters worse, Beckett is also forced to move in while her apartment is being fumigated, causing tension, humor and more than a little awkwardness.