"Criminal Minds" third episode for season 11 is titled "Til Death Do Us Part" and will find the BAU trying to solve a series of murders that are related to weddings.
The third installment of "Criminal Minds" season 11 opens up with a scene in a flower shop with a group of would be bridesmaids to a wedding checking out the store and its services. They are entertained by a wedding photographer named Ryan while Nicole, the lady owner, looks on with delight. In a report by Entertainment Weekly, the ladies then teasingly invited Ryan to join their bachelorette bash.
Meanwhile, at the BAU headquarters, Hotch and company are still on the trail of Montolo, the hitman. Garcia is still nowhere near to finding the Dirty Dozen list of victims. She is worried sick and so does the team. They get a call about two dead female bodies found in Georgia with sashes wrapped around their heads. The motive is a puzzle but the clue leads the team to believe that whoever did it has issues against weddings and marriages.
The episode then moves back to the flower shop in Savannah where florist and owner Nicole is revealed to have a sister named Dana who also works in the shop. It is established that Ryan and Nicole are an item but Dana fancies herself as the real object of affection of the photographer. It later turns out that Dana is not just having an ordinary crush. She is having hallucinations that Ryan would do anything just to be with her. This imaginary Ryan then tells her to finish off a girl who was reported missing after attending a bachelorette party. Dana gets away with it.
It would have been a perfect crime until Ryan decides to invite the sisters Nicole and Dana to dinner where the photographer proposes to Nicole. Dana snaps and her imaginary lover tells her that Nicole tricked him into asking her to marry her instead of Dana. The BAU pieces all clues and information until they discover Dana and Nicole in their greenhouse. They convince Dana to let Nicole go then arrest her.