A surprise death in the law enforcement community seems to be the work of escaped serial killer, Phillip Stroh. Ricky Raydor helps the division with a difficult search for a Mr. and Ms. Bechtal, and Emily Raydor offers Rusty some sound advice.

Unable to locate Stroh in the present, the squad looks for answers in his distant past, hunting for the former Ms. Bechtal. Meanwhile, the squad struggles with Chief Mason, and Rusty grows frustrated with forced proximity to Gus.

In an hour-long Christmas extravaganza, Richard and Mad Men actor Jon Hamm tour Hong Kong, taking in a tai chi drop-in session, a ride in a chopper and some fusion dim sum.