Plot summary
Monk and Sharona pretend to be married in order to go undercover at a couples' therapy retreat and investigate Lt. Disher's new stepfather, an antiques dealer ( Nestor Carbonell ) over 20 years his new wife's junior. The man is obsessed with finding a cache of gold supposedly hidden on the property during the California Gold Rush, and Disher begins to suspect him in the disappearance of his business partner ( Michael Ensign ). Jane Lynch guest stars as the therapist, and William Sanderson as Joshua Skinner.
Credits
Adapted from Wikipedia contributors, Monk season 2. HTML formatting and reference markers removed.