Larry Herron

With some urging, Mitch joins in on Cam's efforts to save an old tree in the park, but just how far will they go? Jay and Manny are each pushed beyond their comfort zones when they attend a kid's Olympics-themed birthday party, and Claire brings Gloria along on a Costco run -- but add in a "pregnancy brain" and it makes for quite an eventful trip.

While vacationing in Mexico, Lightman and Emily become involved in the case of a missing American woman; Foster investigates tainted blood in local hospitals.

The team pursues a killer who targets women; Hotchner turns to an FBI cadet for help.