Examining evidence about Neanderthals that sheds light on the hominids, which died off some 30,000 years ago. Included: geneticist Svante Pääbo's 2010 reconstruction of the Neanderthal genome, which posits that modern humans and Neanderthals interbred at some point in the distant past.
Rayna and Juliette are locked for their tour. When Rayna suggests taking her girls with her, she finds that Lamar's not above holding her hostage with some long forgotten family secrets. To everyone's surprise Juliette and Sean have eloped, though not everyone is celebrating. Deacon reconnects with a former flame, and Avery follows the advice of a new music producer that puts more space between him, the band and Scarlett.
When Judi's college boyfriend shows up to rekindle their romance years after he left her, Fran pushes Judi to pursue it.
Drugs, humans, weapons and money can be hidden anywhere by anyone at any time, and nobody knows that better than the law enforcement officers who work on or near the border. Laredo narcotics officers raid a residence in a school zone after a confidential informant buys crack cocaine direct from a drug dealer's house.
Michael Portillo travels from Stoke-on-Trent to Winsford, Cheshire, finding out about one of the greatest locomotive factories in railway history along the way. He also discovers the dark side of the Industrial Revolution and learns how Victorian potteries brought their products to the masses.
Jarrett sinks to a new low in his negotiating skills when he fails to deliver a trailer-load of surfboards on time and the customer demands a discount. Marc takes on a Monster Truck only to find there are no "travel wheels," making the load oversized.
Chris and Robbie win a creepy load of horror memorabilia but the real scare comes when the cargo is twice as big as they agreed on. Roy thinks he has plenty of time to haul a trailer full of rare film prints to Austin in time for a movie screening but he's foiled by an overweight trailer and multiple blowouts.
Joy's mom meets her new family members at Wilbur's christening. To avoid friction with her mom, Joy makes her son Owen pretend to be someone else. Elka touches up a church fresco. Victoria's incessant Emmet talk annoys Melanie.
Bobby and Krista attempt to rescue a group of stranded tourists from a raging forest fire, but they need help from the rest of the Arctic Air crew if they're going to make it out alive.
Jay and the family plan to celebrate New Year's together at a hotel in Palm Springs, but the hotel doesn't meet their expectations; Alex and Haley are faced with challenges as they try to watch the kids back at home.
Severide finally addresses Chief Boden about his injury and makes some important personal decisions about his future. Meanwhile, Casey struggles with family matters and Dawson takes matters into her own hands when she discovers a young girl who is the sole survivor at the scene of a rescue call.
In South Korea, Cory and Justin meet the ship delivering Buffalo's water bomber plane to new buyers there. But the boys are frustrated by the buyers' poor planning. Tempers flare when they try to get the plane off the ship and delivered to its final destination. After taking part in a military paratrooper jump, Mikey brings in fashion model Kate Eaton to join his team for the Frostbite 45 snowshoe marathon.
Axl feels embarrassed when he and Sue are asked to work on a school project together; Brick's school therapist (Dave Foley) tries to help him make friends.
The extended Doyle family shows up on the doorstep unannounced and in huge trouble, leaving Jake and Mal to tangle with some formidable gangsters from across the pond.
Grace tells Kit devastating news about the aliens' experiments on Alma; Dr. Thredson receives an unexpected visitor; the Monsignor goes to extreme lengths to silence Jude.
On his first assignment in a new division that pairs police officers with psychiatrists, the erratic Detective Aidan Black and Doctor Daniella Ridley must solve the strange murder of a young boy found stabbed, and with a lightbulb sticking out of his chest.
June and Chloe attend their first tenants' meeting after a new family moves in the building, but they make a scandalous scene and June quickly realizes that she needs to clean up Chloe's act so that they're not branded the floozies of the building. However things backfire when Chloe decides to set her sights on Mark, which is then further complicated by James' attempt to sabotage June's virtuous efforts.