Barry and team are surprised when Mon-El and Hank Henshaw arrive on their Earth carrying a comatose Supergirl who was whammied by the Music Meister. Unable to wake her up, they turn to Team Flash to save her. However, the Music Meister surprises The Flash and puts him in a similar coma, one that Team Flash can't cure. Kara and Barry wake up without their powers in an alternate reality where life is like a musical and the only way to escape is by following the script, complete with singing and dancing, to the end.

This episode began in Supergirl S02E16.

Jess avoids her feelings for Nick by taking care of her dad in Portland. While attending a work party with Reagan, Nick panics that they really don't know each other. Meanwhile, Aly prepares to meet Winston's mom for the first time, as Winston admits he hasn't told her they are cops.

Tonight, two of Gwen's artists are shocked by the challenge of having to take on a Celine Dion song - in front of Celine, herself. Alicia and DJ Khaled are floored by the two R&B stars she paired against each other, and Luke Bryan and Blake team up to surprisingly show two young pop artists how to work the stage. Gwen, Alicia, and Blake each have a steal left, while Adam has two - and is on the hunt.

Stef starts a new assignment in human trafficking where she meets a young girl turning tricks on the streets.

When it seems as though Chip is getting scammed by a girl he met online, Mickey tries to teach him how to be a "wolf" vs. a "sheep". Meanwhile, Sabrina is scared that her boyfriend is beginning to mirror Jimmy's ways and she plans an intervention.

Each leading character's final story begins to unfold. Brennan testifies for Zach in trial, Angela reveals some big news, while Aubrey and Jessica come to terms about their future together. All the while, the team discovers Kovac has escaped, leaving Booth in a race against the clock to protect himself and those closest to him from what may be Kovac's most dangerous plan yet.

Johnny tries to stop the spread of lice. Moira tries to get out of having a garden named after her.

The Legends must devise a plan to retrieve the last remaining fragments of the Spear of Destiny from the Legion of Doom. They find themselves in France at the height of World War I faced with the knowledge that they must destroy the mystical object. They enlist the help of a soldier by the name of John Ronald Reuel Tolkin and find that the Spear is leading them into the heart of the war. Meanwhile, the team must all resist the temptation of the Spear, and the return of a former teammate.

Tensions between the Farrells and the coal company take a devastating turn.

Good news, Izzy's not pregnant, so why's she housecleaning away her feelings again? Jack inches closer to the point of no return with Ruby. All the while, the clock's ticking on the daunting arrival of Emma's hyper-conservative parents.

After coming up bust on a match to the DNA found in Larry's bedroom, Josh and his team discover a "sex print" on the wall that leads to a new suspect. Meanwhile, Josh gets sloppy and inadvertently gives a piece of damning evidence to the prosecution.

In the series 100th episode, a mysterious young woman has Bay and Daphne flooded with memories of their deceased father Angelo, and they must decide if they should let her into their lives. Toby is caught between his mother's wishes to baptize his son Carlton and his wife's feelings about faith. Melody asks her sons to make amends so the family can be together for her birthday, but it might be too late.

The remaining artists form two super teams to create a family of deranged, murderous mutants.

When the new suspect turns up in a coma, Josh becomes sidetracked trying to solve this crime, eventually becoming a suspect himself. Meanwhile, prosecutor Carol Anne Keane presents the autopsy report, which reveals Larry's wife was struck by a blunt object, leading to a frantic search for the murder weapon.

Kate helps Anne on a reconnaissance mission. Jenny reaches the limits of her self-exploration, and Frankie enters a new work/home reality.

Mary Jane and Lee make risky decisions that could affect their relationship. Meanwhile, she agrees to join forces with Justin, so they devise a plan to oust Rhonda out of the anchor chair but Kara gets caught in the crossfire.

At Delilah's taekwondo tournament, Nate has to have a tough conversation with Jared and an even tougher one with Carlos.

An unanticipated trip home puts Ezra at a crossroads about his future. Maddie and Patrick's get-away is equal parts romance and deception. Jules comes face-to-face with her past.

Suburban kids test the limits of a trampoline, a leather salesman speaks his mind, and Daniel takes down some local restaurants.

When a turf war escalates, members of truck and squad find themselves caught in the middle as unsuspecting hostages when a group of armed gang members take cover and assume control over Firehouse 51. The situation turns even more dire when one of the infiltrators is wounded and in need of serious help.

Philip and Elizabeth tell Paige more about the family business, but pressing new questions arise when an operation takes a ghastly and unexpected turn. A sensitive package jeopardizes Oleg's life back in Russia.

Ms. Snap changes the school lunch menu while Ms. Feldman starts an underground junk food ring; Hot Dad volunteers for lunch duty and Ms. Bennigan works up the nerve to ask him out on a real date.

After getting fired by a furniture store client, Tim and Sam try to make an ad for the store's main competitor, who struggles on camera.

Trevor runs through the busy news day, Jordan Klepper looks into President Trump's 2020 bid, and Dahlia Lithwick discusses Neil Gorsuch's SCOTUS confirmation hearing.

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Actor Ryan Reynolds; actor Josh Lucas; actor Andy Daly; Green Day performs.

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With Gus back home, Mickey realizes she needs to make a decision. But her attempt to straighten out her love life only creates more chaos.

An insidious new drug hits New York. Danny recruits Colleen for the fight, and Claire discovers that credit cards can have many uses.

As the gang cools their heels at a country manor, a budding love triangle brings tensions to a boil. But the pressure to sell the gold tub forces the friends to work together. Meanwhile, Vic plots a prison escape with pal Hate 'Em, only to find a chilly homecoming awaiting him on the outside.

Mindy's world is turned upside down when her cool friend from childhood moves to New York and starts dating Morgan. Meanwhile, Ben has to cover his tracks after the nurses spot him in a provocative situation.

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