Boston's Big Dig was one of the most ambitious engineering projects in history, but in 2006, a fatal collapse in one of its tunnels put the ambitious project in doubt; experts reveal what caused this engineering disaster and how it was fixed.
When Boy discovers that somebody is writing a fantasy novel inside his diary, he decides to act more like the story's hero and soon finds himself as one of the cool kids.
Walter makes a discovery as everyone gets ready for Melissa's party. Uncle Valy comes to Kobna's rescue when he struggles to ask Kerry out.
As Jason contemplates surgery for an injury, Bravo Team is on a mission abroad to help the secret service prevent a sniper attack on U.S. dignitaries.
An unexpected visit throws Casey for a loop. Severide sets out to exonerate a wrongly convicted arsonist. Kidd pays the price for burning the candle at both ends. Cruz goes on a mission to fix one of Otis’s old toys.
The SWAT team engages in tense negotiations with a family that takes a local officer hostage when they’re evicted from their home due to eminent domain. Also, Hondo reflects on his personal life choices as he helps his father through a medical crisis and Chris’ relationship with Kira and Ty reaches a critical juncture.
Cameron and Mitchell’s friends mistakenly assume they have split up and have definitely chosen a side, and Haley attempts to cook Thanksgiving dinner as a thank you for Claire and Phil’s support with the twins. Meanwhile, Jay invites Phil and Dylan out to fly his model plane, and Phil thinks this is his chance to reclaim his dignity after their first outing 10 years ago went so wrong.
April receives unfortunate news that makes her question her future with Ethan. Dr. Charles and Maggie see tough times on the horizon. Natalie’s memory from the accident starts to return.
Halstead's secret ongoing relationship with a woman connected to another case puts him in jeopardy.
When Will gets busy cooking Thanksgiving dinner at Douglas’ home, he asks Angie to hang out with Tracy Freeze. Angie reluctantly does so, only to realize that Tracy is actually wonderful, except for a secret she’s keeping from Will. Meanwhile, Miggy shows up to Thanksgiving dinner with the kids’ teacher, Ms. Pronstroller, as his date, and he enlists Douglas’ assistance in helping them form an in-person connection, given all of their previous communication has been via texts, DMs and memes.
A young man is found dead behind the wheel of his taxi; since robbery seems like an unlikely motive, Kenda and Gaenzle wonder if it was personal.
Dex goes undercover after she is hired by a local politician to dig up dirt on his political opponent. Meanwhile, Grey and Liz’s romance continues, and Dex celebrates a tense Friendsgiving at Bad Alibi.
The teams host a corporate away day onboard the iconic Belmond British Pullman train.
Pop begins to discover how Ace is bringing the dark history of Jerusalem's Lot back to life in the present. Annie takes the fall for Joy.
Julia is forced to make a drastic decision when she finds out that Isaac has been secretly working with Leon for advice on his current patients. Meanwhile, Roxy takes her new protégé back to her old gym, where she runs into old enemies from her gymnastics days, Tim is on high alert when Edie misses a family event to "work" all weekend and Julia steps back into the dating scene.
CB celebrates Thanksgiving by having all of William Penn rally around him after a cooking incident at his house, while the alumni faculty football game brings out the competitive sides of Wilma and Coach Mellor.