Gallo, Violet and Ritter debut their microbrewery business at Winterfest. Brett prepares to present her paramedicine program to an oversight panel. Firehouse 51 gets in the holiday spirit.
Castaways need to alter their plans after the winner of the immunity challenge throws a wrench in their next big move.
When David Hodges goes missing, the entire CSI team searches for any piece of evidence that can help locate him, clear his name and save the reputation of the entire crime lab.
Nia weighs her options; Marie challenges the premise of Ben’s new movie idea.
TJ’s shocking twist sends the players into a panic as they battle for survival before the Final. One player finds themselves on blast for trying to help another player during a tight elimination. The remaining players begin TJ’s Final.
The outcome of Will's investigation weighs heavily on his mind as he works with Dylan to save a 4-month-old patient. Stevie and Vanessa both struggle to keep their secrets. Crockett and Blake work with Abrams to save a patient in need of a liver transplant.
Paul attempts to train an overly eager German Shepherd puppy who doesn't know how to calm down, and has to gain the trust of a terrified West Highland Terrier.
With the FBI closing in on the Roy Walton investigation, Voight and Halstead strategize on a way out. After a city bus driver is shot by a passenger, the team investigates a possible abduction.
When the Gang suspects Dee is menopausal, they scramble to find a new employee for Paddy's Pub. Dee decides to put her acting career on hold in order to mentor young actors.
In the past, an innocent Dennis learns the horrifying details of Frank's business, a truly sweet Dee is excited to head off for Hollywood, while Charlie and Mac's jobs at the roller rink are in jeopardy.
The final two singers from "Group B" perform solo, and then with celebrity duet partners and show panelists Nicole Scherzinger and Robin Thicke, before one is unmasked and sent home.
Gina and Emily investigate a juicy rumour about Shannon and Heather's old friend, Nicole; Gina feels compelled to reveal the truth, resulting in an explosive string of arguments that shuts down Heather's party.
Seung Yoo tries to bring Yoon Su out into the world from her rut by getting close to her heart, just the way she helped him. Meanwhile, Yoon Su keeps her identity hidden while collecting evidence of Noh Jung Ah's corruption. However, when Yoon Su's identity is in danger of getting exposed, Seung Yoo stands in front of her.
Working-class Americans are tested for their strength, endurance, agility and mental toughness in challenges that take place in the real world.
Mark and Digger retrieve their sea-aged whiskey only to discover how easily it slips through their fingers. Richard and Craig run into trouble upsizing absinthe production. Tickle and the Laws look to moonshine history to get their season on track.
In Kentucky, 13-year-old David Oakley comes home to find his stepmother murdered and his 15-year-old sister Jenna missing. Fearing for the girl's safety, police race to piece together a killer's video trail, only to uncover a brutal plot.
On a remote island in the Pacific, Will Smith descends into the heart of an active volcano to investigate sounds beyond human hearing. Will discovers that everything on our planet creates its own unique sound—even if we can’t always hear it.
For Will’s final journey, an ultimate challenge. He and polar explorer Dwayne Fields are dropped by helicopter in the middle of an Icelandic glacier.
Will explores the Namibia Desert, where both the landscape and time seem to have stood still for over 50 million years. Will discovers that humans can only see a small sliver of what’s moving around us because everything on the planet is happening either too fast or too slow for us to perceive.