Robin, Ted, and Barney go to a hot new club, leaving the engaged Marshall and Lily to a more adult, albeit boring, evening of wine tasting.
A woman in an open marriage suddenly becomes ill during a date with her boyfriend; House tests Wilson and Sam's relationship.
Carrie asks Doug to be an expert witness at her boss' trial, but then doubts her decision. (TV-PG)
Romantic sparks begin to fly when Patrick Jane and supposed psychic Kristina Frye (guest star Leslie Hope) cross paths again during the CBI investigation into the murder of a charismatic head of a non-profit organization that fights human trafficking.
The BAU leads the investigation into a string of murders taking place in supposedly haunted houses in Lewiston, Maine.
