Christy competes with her classmates for a prestigious internship; Bonnie baby-sits Tammy following her oral surgery.
The BAU team investigates when the remains of a dozen people are discovered along a creek bed in Yakima, Wash.
In the midst of a heat wave, Neil has a fling with Angelica, a prominent commercial actress; Tommy accidentally ruins the joy of Arpi's scratch-off lottery habit and helps her by revealing a secret hobby of his own.