Contestants test their skills with primitive weapons and navigate a dangerous underground cave in the Team Challenge. As the competition nears America's vote, the contestants fight to prove who is most heroic. In the War Room, Dwayne asks the hero hopefuls? "What if-

In a classic HELL'S KITCHEN challenge, the final four chefs will use only their senses of sight, taste and smell to identify the ingredients in Chef Ramsay's dish and recreate it. The chef whose dish comes the closest to Chef Ramsay's earns a shopping spree and spends quality time with Chef Ramsay at his restaurant, The Fat Cow, while the losing team clears out the dorms on moving day. Later, the pressure at dinner service is immense as the chefs run the pass. Then, Chef Ramsay must make one of the most difficult decisions yet and send two of the four chefs home.

Another houseguest is evicted from the compound.

Michael and Fiona pose as hackers at a malicious programming syndicate in order to steal information for Sonya. But Michael's life gets complicated when working with Fiona again brings back painful memories. Meanwhile, Sam and Jesse help Barry track down a former girlfriend in exchange for falsified documents.

In the Season 12 opener, the designers fly high when they arrive on an airport runway and then must create looks from parachute materials.

A Los Angeles Dodgers World Series pennant signed by Frank Sinatra; a replica of the DeLorean from "Back to the Future".

Rifles with rotating barrels; a pair of cleats worn by former MLB player Bucky Dent. Also: Chumlee breaks a coffee machine.

Charlie suspects Jen's boyfriend, Sean, is cheating on her with his patient, Lacey. Also, Nolan's apartment gets robbed.

Red gets pressured to smuggle drugs through her kitchen; Larry publishes an article about Piper in the "New York Times;" two babies come into the world.

Tristan lets his eyes wander to his roommate, Miles. Not ready to come out to the new kids, Tristan panics and pretends to have a girlfriend. Could a fake girlfriend bring real problems?.

Star players are Valerie Bertinelli; Cheryl Hines; Sarah Chalke; Yvette Nicole Brown; Rob Riggle; and Matthew Morrison.

When a beautiful woman staggers into the street and collapses from an apparent overdose, Andy and Marlo chase down her dealer, tackling him in a cloud of powdered heroin. The arrest sends 15 Division into emergency response mode when the drugs prove to be laced with deadly bacteria. Led by Swarek, the troops scramble to get the contaminated heroin off the streets before a deadly outbreak sweeps through the city. Andy and Marlo are plunged into an awkwardly intimate decontamination process, forcing Marlo to expose a shocking secret. Meanwhile, Dov and Chloe comfort a man whose wife has fallen victim to the dirty drugs, and their budding romance is threatened when Dov suspects Chloe of harboring a dark secret.

Wilfred forces Ryan to collaborate on a birthday gift for Jenna.

Steve's morals are tested when Ruth, an innocent Amish girl, enters the bar on her Rumspringa, searching for a man to give her a "wooden bird". Things get more complicated when Owen becomes convinced Ruth is his long-lost-sister. He suddenly becomes her over-protective big brother. Meanwhile, Ok Cha becomes addicted to the power of her first credit card and gets into a minor traffic accident with a NASCAR driver (guest star Brad Keselowski).

On last day of alligator season, a massive cold front hits the bayou-driving swampers to extreme measures in order to tag out. One hunter is forced to make the risky move of crashing his boat through a beaver dam, while another hunter puts his life on the line to save his beloved partner.

Mike convinces Bello to steal from the most powerful drug cartel in Southern California and calls on Johnny's unique underwater skills to help. Briggs helps Charlie go to extreme measures to cover-up her bad decisions in the aftermath of a bust that went very wrong.

Sarah Vowell

Jeff Garlin, Olivia Munn, Kumail Nanjiani

Jeff Bridges

Liev Schreiber, Adam Newman, Cold War Kids

Anthony Hopkins, Amy Schumer, Robert Randolph and the Family Band

Jeffrey Tambor, Cristela Alonzo

Ratchet reluctantly agrees to help the Decepticons perfect the synthetic energon formula. But once it is completed, he decides he can't allow the Decepticons to have it or finish building their new Omega Lock, so he sabotages the project and tries to escape from the ship. The Autobots launch their drone and Optimus Prime follows it, but along the way he is confronted by Starscream and his armada.