The castaways are confronted with two immunity challenges and two tribal councils, which force them to consider making big moves on their most imposing threats.

With nobody eliminated last week, the Top 4: Candice Glover, Kree Harrison, Angie Miller and Amber Holcomb come out and sing again. This week's themes are: Songs of 2013 and The Standards. Guest mentor Harry Connick, Jr. helps out the contestants.

After discovering that Sue's life, as defined on Facebook, is pretty pathetic, Frankie creates an online alias (or two or three) and tries to make her daughter as popular as possible. Meanwhile, after reading Tuesdays with Morrie, Frankie's healthy dad, Tag, coerces Mike into listening to his long-winded life stories on a weekly basis; and Axl and Brick attempt to garner interest in getting a bunch of baby bunnies and kittens adopted by producing a viral video starring the animals in a James Bond knockoff.

The top 16 artists perform live in front of celebrity coaches Adam Levine, Blake Shelton, Shakira and Usher for America's vote. Carson Daly ('Last Call with Carson Daly') hosts. Christina Milian ('Be Cool') serves as Social Media Correspondent.

Finding it difficult to mend fences with Tommy and Diggle, Oliver instead focuses on crossing another name off the list. While digging through a crooked accountant's laptop, Felicity discovers a transaction that could help Oliver find Walter. To reconfirm the lead, Oliver gambles that Felicity can be counted on in the field for the first time. In a flashback, Malcolm reveals to Robert Queen and Frank Chen painful details surrounding his wife's murder, and how that shaped his plans for the Glades. Meanwhile, Tommy stuns Laurel with the truth.

Mixing family with business is never easy, and Jack Shea is about to learn that lesson the hard way. When Jack's father, Tony, has a heart attack and is forced to hand over the keys to his beloved handyman business, Jack's eager to finally step up and make his father proud. Unfortunately Jack's past career efforts have been less than stellar, so everyone seems to be waiting for him to fail. His new job isn't made any easier by Tony's rebellious, troublemaking assistant, Darren, and Darren's flirtatious sister, Stitch, who works at the local hardware store. But with the support of his Aunt Terry and his oddball yet endearing cousin Mason, Jack Shea may just find his true calling right at home.

In the wake of the catastrophic asteroid impact believed to have wiped out the dinosaurs, Australia was set adrift on a lonely voyage across southern seas. With host Richard Smith, NOVA travels the walkabout continent to uncover how it became the strange land it is today. In this final episode, "Strange Creatures", NOVA traces the last 65 million years, revealing the events that shaped the Australia we know today. Prehistoric jungles retreated, replaced by eucalypt forests, grasslands, and deserts. When humans first arrived, giant marsupials dominated the land and the Great Barrier Reef was yet to form. This is a tale of calamity and conquest; how a conspiracy of climate, biology, and geology shaped the Earth we now call home.

The BAU travel to Rapid City after two male victims are discovered murdered in a ritualistic manner. Also, Reid continues to grieve over Maeve's death.

A suburban teen is brutally assaulted when a concert turns into a mob scene. Friends and eyewitnesses give mixed accounts of the event, and Detective Amaro finds himself trying to save the reputation of the prime suspect, a fellow military veteran whose fractured memory could hold the answer to why the girl was targeted.

By spinning the Wheel of Mythfortune, the MythBusters find themselves taking on five random viewer-suggested myths with titles like the Monty Hall Paradox, Lumber Car, Firearm Fashion, Hit the Deck and Flaming Tire. Keep those ideas coming!

When Sam and Dean receive a distressing video message from Kevin Tran, they set about trying to uncover the Third Trial. The boys make a discovery that sends them to a casino in Colorado, to find a mysterious recluse who may be able to fill in the holes in Kevin's research. Meanwhile, Crowley is on a winning streak. Castiel tries to elude Naomi and the angels hunting him.

Phil is jazzed to share the wonders of residential real estate with Luke and Manny's classmates for career day, but unfortunately for Phil, his nemesis, Gil Thorpe, shows up and things get ugly. Meanwhile, Gloria challenges Jay's claims of always wanting to become a novelist, forcing Jay to take some shameful measures, and Mitch and Cam make a costly mistake while executing tooth fairy duties.

Grace learns about the missing money from Jimmy before investigating the abandoned shooting range; Grace sends Tom and Evie packing; Grace gets into Santa Rita with Mitch's help.

Elaine and Max encourage Polly to put her needs first, as they did when Polly was growing up, and offer to babysit Natalie so Polly can spend time out with Scott. But they get a quick lesson in parenting the middle ground between letting kids run the show and ending up on a milk carton.

The CSI team investigates a popular spiritual retreat when a body is found floating in a mud bath. Meanwhile, Hodges questions his marriage plans to Elisabetta.

After the Mayor dies in what appears to be a surfing accident, Shawn investigates and ends up running for mayor himself.

Accused of sexual misconduct by a former paramedic candidate, Severide faces potentially dire consequences and fights for his survival both within the Chicago Fire Department and the legal system. Detective Voight returns, looking to collect on the favor that Dawson owes him for helping her brother, Antonio. Casey falls back into old patterns in his personal life, while Dawson, Herrmann and Otis become the proud owners of a real neighborhood bar as Molly's prepares for its grand opening.

Liam invites Rayna to run away with him to finish her album, and Deacon is surprised by his own reaction, as well as Stacy's accusations; Jolene warns Juliette about Dante's loyalty, which only drives the two women further apart; Teddy faces off with Peggy about the leaks, and in the wake of her father's illness, Tandy proposes a new alliance to Coleman. Meanwhile Gunnar tries out some new music, and Avery and Scarlett reconnect

A bizarre confrontation occurs between Nia and Jordan.

Coming Soon...

When Philip and Elizabeth are ordered to go through with a meeting that could potentially be a set-up, they find themselves confronted with unexpected truths about their relationship. Stan's investigation puts him and the FBI even closer to Philip and Elizabeth.

Kay Bailey Hutchison

Bo Burnham

Macklemore & Ryan Lewis

Tobey Maguire, Tom Odell

Kathy Griffin, Eli Roth, Cheap Trick

Michael Ian Black, Lena Headey

Lula is not happy after new pupil Fergal tries to get Harley to behave out of character. Lorraine ends up making a surprise announcement, Grantly finds it hard to keep his illness under wraps.