The BAU searches for an UnSub who is purposely disfiguring victims. Also, Rossi has an awkward reunion with his ex-wife, Hayden Montgomery, who kept his daughter, Joy, a secret from him for nearly 30 years.
Shawn deals with a setback on the Christine Rose; Vernon hatches a plan to steal a boat from an old enemy.
Family members rush their chihuahua, Darcy, to the clinic after it is hit by a car. For 18-year-old TaJournée, who is autistic, the dog is a lifeline, and Noel must use pins, nuts and bolts to reconstruct the broken pieces of its crushed pelvis. Meanwhile, the vet finds himself in a tricky situation while performing replacement surgery on a seven-year-old spaniel with hip problems, and a Winchester Prison sniffer dog that is lame in both elbows is brought to the surgery.
Rachel returns to Syndicate 9 following a year with Vice and she needs some time to rekindle her neglected friendship with Janet. The shocking murder of Michael Edgerton forces her to hit the ground running as she steps up to Acting DI under the watchful eye of Julie Dodson.
Big Al makes a last ditch effort to keep sluicing; Bernie learns old timers may have taken more gold than he thought; Karl brings in help to try and hit his 1000 oz. goal; Chris & Nika check their gold haul with one of their investors, Chris’ Dad.
Ethan and Mia learn who the assassin is; Marlon contemplates going straight; Marty battles public opinion; and Harper harasses Marty's clients while trying to dig up dirt on him.
How did engineers move mountains to build the longest and deepest rail tunnel on the planet? Discover how 25 million tons of rock were moved to build this modern wonder, the Gotthard Base Tunnel.
Dre’s sister, Rhonda, is getting married to her girlfriend, Sharon, and the upcoming nuptials lead to a conversation on tradition. Dre finds out that Bow is against the patriarchal convention of taking the man’s last name, but he never knew this because Bow’s maiden name is also Johnson. Meanwhile, Jack and Diane want to be the ring bearer and flower girl but worry they’ve aged out of the gigs, and Junior and Zoey prep Ruby to embrace her daughter’s relationshi.
Mike is upset that Axl is considering quitting football and losing his scholarship, Frankie does not like Sue's new activist boyfriend, and Brick struggles with the responsibilities of being an online product reviewer.
While working in an art supply store, Michael astounds a customer with a framing device, shocks a patron who can't see the whole picture and becomes a piece of art. Later, a woman goes haywire when Michael literally loses his head.
The compound receives a visit from two of The Movement’s elders for its annual Ascension Day picnic. Their arrival calls Cal’s leadership and the future of The Movement into question. During the festivities, Abe learns of Mary Cox’s troubled past, and Hawk decides to take a step closer to Ashley.
Philip must consider his life with Martha and make a crushing choice from which there is no coming back.
Claire brings home a stray dog and gets the kids to help her hide it from Phil while she tries to find its owner. Unfortunately, her evasive behavior only makes Phil try even harder to shower her with more attention. Elsewhere, Gloria invites a new couple over even after Jay has made it clear he doesn’t want to make any new friends, but when the husband turns out to be a real guy’s guy, Jay might be eating crow. And Cameron rents out their upstairs apartment to a Christian rock band.
A separation in tribes leads to the ultimate sabotage. Also, a schoolyard pick draws a line in the sand at a tough Reward Challenge.
Jake secures shifts for Jenna and Tamara at the country club for the Fourth of July, but Sully’s plans for an after-hours party on the golf course lead to some dramatic fireworks.
The bladesmiths need to create a weapon in their signature style from a large pile of mixed metal that is welded together.
With help from an old friend of Holt's, the gang sneaks into the FBI to find dirt on the double agent. An inmate puts Charles in an awkward position.
Stewart is concerned about Dean Sr.'s anger issues complicating their case, so Dean arranges some focus-group testing to see what the masses really think.