As Rob and Sharon celebrate a tainted wedding anniversary, Fran and Chris are drifting further apart. Elsewhere, Dave's flourishing love affair with Catherine - a high achiever he's met through AA - is gathering momentum.

Boden's new neighbor asks him for a favor that could have serious repercussions. Severide is upset when he's treated like a candidate by Patterson. Cruz is visited by a gangbanger who knows his brother. The team responds to a call that involves an 18-wheeler; and is thanked with tickets to see Rush.

Bugsy Siegel bets his life on a Las Vegas casino, while the Moulin Rouge breaks the color barrier, Sin City's origins are a popularity contest for J.T. McWilliams and William Clark.

Liv consumes the brains of a death-obsessed illusionist who was murdered in cold blood during a magicians’ convention in Seattle. As Liv and Detective Babineaux investigate the case, she uses her new skills to help narrow down the suspect pool. Meanwhile, Blaine gives Liv some interesting news, and Ravi makes a decision but things don’t end up going quite as planned. Lastly, Major continues to distance himself from Liv.

Brian offers to use NZT to capture the FBI's "Ten Most Wanted" criminals in two weeks, in exchange for Naz giving him his own personal work "headquarters" at the agency. Also, the secretive nature of Brian's new life working for the Bureau creates a rift between him and his father.

The scientists and the Army battle for control of the bomb.

The S.H.I.E.L.D. team discovers dangerous truths about the ATCU, and Ward’s plans to destroy S.H.I.E.L.D. takes a surprising twist.

In order to clear his name, a petty officer volunteers to be court martialed if NCIS agrees to conduct its own investigation after his murder case is dismissed due to a mishandled warrant. Also, Bishop and Jake discuss their marital problems.

The fiancé of Pride's daughter's friend goes missing during a blackout; and the team locates the man's dead body, which holds clues to the cause of the blackout.

The buyers head for the mountains and hit high altitude in Rimforrest, CA where they face auctions in the snow! Mary weathers the storm with gusto as Casey tries to keep Rene's eyes on the prize. Ivy doesn't let the cold weather freeze him out and goes on a buying spree, while Dave tries to heat things up.

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Grodd returns to Central City and kidnaps Caitlin. Barry and team race to find her before it’s too late. Meanwhile, Cisco plans his first date with the new barista at Jitters, Kendra Saunders and Patty begins to suspect Barry is hiding something from her.

Mindy joins a support group out of sheer loneliness while Danny is out of town; Morgan and Colette discover what Tamra does in her spare time.

Rooney Mara (Carol (2015)); Jesse Tyler Ferguson (Modern Family (2009), Broadway play "Fully Committed"). Also: Justin Bieber performs with The Roots.

America's votes are revealed and the bottom two artists must perform for America's instant save. Pharrell and Blake sing with their teams.