When Wendell gets caught up with a snobby group of Magnet school kids, Vinnie struggles to be a better disciplinarian at the urging of his judgmental father.
It's finally time for Regionals, and the glee club is more determined than ever to advance to Nationals. Brittany returns from her MIT trip with a new attitude and Ryder finally has a lead on who is "catfishing" him.
Charlie lets his father help him coach a high school baseball team with bad results.
Big Time Rush are accused for scandals: Lucy Stone releases an album about a bad break-up with a guy who is rumored to be Kendall, Carlos tries to swat a bee and is accused by E! News for hitting grannies and Logan is accused for trying to rob a granny, which was really helping. Meanwhile, James spreads up a rumor about him doing a duet with Cher Lloyd.
Maggie’s patience is put to the test when Rhiannon goes off the rails; Sonya sets about recruiting a school handyman; and Connor is bullied into a dodgy deal by Barry.
The top 2 finalists are determined. Lauren Alaina performs; Alicia Keys performs.
Gary loses his summon word at a concert. Whoever finds it will have total control of Gary. Unwholesome hilarity ensues.
The music business is Zach's next frontier as the front man of the first ringtone band. Embracing his "rebel" persona, he takes to the stage with his sidekick Greg and the beautiful Christy.
Cat and Vincent go on a date out in public in an attempt to be a normal couple, which backfires on them. Meanwhile, Gabe reveals some information that gives Cat hope they can find a cure for Vincent.
Walden dates an attractive 22-year-old (Hilary Duff), but ends up being more interested in her grandmother (Marilu Henner); Jake and Alan go on a trip.
A Missouri man kills two people at a friend's home, then continues the bloodshed when authorities come looking for him.
A date between Raj and Lucy takes both of them out of their comfort zones. After a trip to Las Vegas goes awry, the girls join in on a Dungeons and Dragons game, which causes Amy and Sheldon to re-evaluate their relationship.
As Ash and his friends prepare for the upcoming Marine Cup Tournament on board their new cruise ship, the group learns that Mrs. Ripple, a jewel collector, will display her collection after the tournament, but upon the tournament's conclusion she discovers that her rare Eye of Liepard has been stolen. She suspects Mr. Shaw - a businessman and jewel collector who has been asking to buy the Eye of Liepard from her - even though it was watched over by her Watchog all night. Cilan takes on his detective role once more to discover the thief of the Eye of Liepard.
Mitch warns Grace about confiding in Jimmy about her suspicions regarding Max. Max is aware of Grace's real identity and tells Alec. Grace and Mitch go to the parking lot where she was supposed to meet Michael Chen.
A frustrated Severide, turns to an unlikely ally to resolve his current dilemma. Casey begins to find satisfaction in his personal life, while Mills and Dawson face personal challenges. Meanwhile, the squad is called to the scene of a harrowing apartment building collapse.
In the aftermath of the riot, Will blackmails Doreen into helping him and Bea is given no choice but to continue to lie.
After Gus accidentally tampers with the crime where his boss was killed, Shawn helps him find the real murderer before Gus is arrested.