Bianca Malinowski

The hunt for a methodical killer takes the BAU to Arizona to search for an increasingly devolving UnSub, and the team speculates that Hotch is in the running to be the new BAU unit chief.

Mac and Jack partner with older versions of themselves, a Russian bomb programmer and his estranged handler, to shut down a Soviet-era warhead in Moscow. But when the antiquated computer needed to disable the warhead becomes inoperable, Mac must find a way to fix it with only duct tape and wire in time to prevent a new Cold War.

After the crash, Rayna is in a coma and Deacon is left to wait on his pending jail sentence. Teddy is still shell-shocked about Peggy's pregnancy and struggles to understand where he belongs... Is it by Rayna's side with his daughters? Meanwhile, Maddie grapples with the revelation that Deacon is her father and, feeling alone, turns to Juliette, unwittingly revealing the details of what happened before the traumatic crash. And Gunnar and Scarlett's relationship becomes even more complicated after the proposal, so they turn to their friends, Will and Zoey, for support.

When Mac and the team travel to Hawaii to aid in earthquake relief efforts, they team up with Chin (Daniel Dae Kim) and Kono (Grace Park) from the Five-0 task force to rescue a group of government scientists trapped in a building. However, as they work on the complicated rescue, a group using the chaos as a distraction aims to steal the top-secret weaponry from the scientists, on a special crossover episode. Daniel Dae Kim, Grace Park and Taylor Wily From 'Hawaii Five-0' guest star.