Flynn and Vega identify a suspect in the death of an executive assistant, but there appears to be no motive.
Jim convinces Dwight that he needs to choose someone to act as an Assistant to the Assistant Regional Manager; the two subsequently hold tryouts for the position. After her daycare turns away her child, Angela is forced to bring her kid to work. Andy auditions for "The Next Great A Cappella Sensation".
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.
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.
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.
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.
America's vote will put through the top two artists from each team and the coaches will each save one leaving them to move on to the next phase of the competition.
Castaways get a much-needed morale boost with a visit from their loved ones, and one Survivor is faced with a game-changing decision.
A musically-talented teenager returns to her native Buenos Aires after living in Europe.
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.
The CSIs investigate the mysterious death of a ghost hunter and experiences déjà vu when the victim has eerie similarities to an old case.
Frankie tells the kids what she wants for Mother's day so one of them can clue in Mike; after repeatedly failing the driving test, Sue feels resentful when her friends get their licenses; Axl receives stunning news from Cassidy.
Terry and Bill seem to be the perfect couple; the murder of her daughter has led Nancy to hoard.