As the BAU searches for a vigilante killer in Cleveland, Rossi seeks out his former Marine sergeant who is missing. Also, the secret JJ has been keeping from the team may be catching up with her.
Peggy discovers her murder investigation has huge ramifications that can destroy her career, as well as everyone near and dear to her.
When Steve gets involved in the Big Brothers organization, he is paired up with an unruly teenager, and Steve's biggest challenge yet comes in trying to change a tough kid's outlook on life. Lindsay Wagner guest stars.
