Lorne Abony, CEO and Chairman of Mood Media, a leading in-store media specialist that uses a mix of music, visual and scent media to help its clients communicate with consumers, faces his fear of heights when he has to climb a tall ladder to install equipment during his undercover mission. He also gets a lesson in using a soldering iron.

When Eve is suspended from school for calling a boy a bad name, Mike is surprised name calling would be considered bullying. Meanwhile Ryan finally gets a job, but when he buys a motorcycle, Kristin thinks he won't have extra money to help her and Boyd.

A man from Torrance, CA gets the Sharks in the holiday spirit with his rent-a-live Christmas tree service, which hires war veterans to maintain and deliver the trees, creating approximately 200 jobs during the holiday season. An enthusiastic woman from East Hampton, NY asks the Sharks to invest in her fudge that is gluten-free, but not glutton free. The Sharks tell two college students from Santa Monica, CA studying business that they may have a lot to learn when it comes to their fashion accessory that holds a cell phone on your leg. Also, two longtime friends and moms from Los Angeles believe their kids' indoor/outdoor play and party space is a perfect franchise opportunity. Singer-songwriter John Rich surprises entrepreneur Travis Perry from Dothan, AL, during an update for Chord Buddy, a training tool for beginning guitar students which Robert Herjavec invested in during Season 3.

Joe tries to hide his new straight friend Russ from Louis.

When Reba learns that June's school has dropped its music program, she tries to rally the music committee moms to revive it. Cash gets a reputation as a bully after he stands up to the most popular boy in school, and enjoys the popularity that his new "bad boy" persona brings. But when Reba goes toe to toe with the school principal, she gains the same reputation. Meanwhile Lillie takes part in a protest to keep her local pot dispensary up and running.

The Pomrenkes get off to a bad start with family squabbles and a $25K bill. Zeke and Scott M have powerful new dredges but can they rely on their crew of friends? Vernon goes all in, gambling all his savings and his deckhand daughter.

Two men are found dead with a common feature: both have been killed using unconventional methods. Meanwhile, $1 million anonymous checks are left around the city by someone known as Mr. Moneybags.

Egyptian hieroglyphs depict the use of light bulbs in tombs and secret chambers. And batteries may have been discovered among artifacts from Mesopotamia. Did the Ancients understand electricity, and if so, how did they discover this technology?

Parker finds out about the fate of his Grandpa. Todd has to rebuild his turbo trammel, Indian River faces a shutdown and the Dakota boys investigate whether the Glory Hole is truly an ancient waterfall.

In Nice, after participating in a prison escape that unfolds in a similar way as the opening scene of the first film, Frank meets Juliette for the first time. Later, Dieter introduces him to his friend Trina, who hires him to deliver a new eco-friendly engine prototype invented by her father on time to the Paris Motor Show. With Trina as his passenger, Frank races towards Paris, but a dangerous hitman, nicknamed "The Wolf", has been hired by automotive and fuel lobbies to eliminate him before he can complete his mission and destroy this major breakthrough. Unfortunately, the prototype, which is installed in Frank's car, emits a GPS signal which does not turn off, enabling The Wolf to easily track Frank and cling to his heels...

When two motorists driving gas-guzzling cars die at the hands of a sniper, Danny and Kate are put on the case of what the city believes is the work of a radical environmental serial killer. Meanwhile, a bicycle accident sends Danny's son Sean to the hospital with a life-threatening injury.

Iris and Spyke rustle up a gang of former MTV personalities in an attempt to wrest the cable music channel from the tween set. Also: Sandra develops a crush on a guy in her meditation class; and Kath and Dave shoot a video about how to construct a tent.

Frank's latest job goes completely wrong: he loses his package of drugs in a holdup and is accused by his Russian gangster employer of having embezzled the money. To prove his innocence, Frank embarks on a search for the real culprits and through fancy hotels and rundown buildings the trail leads him to old friends from his SAS unit. The soldiers were attempting to settle a score from the past, by using him as a scapegoat while enriching themselves in the process. But when both they and Frank find themselves in danger from the Russian mobster who's out for blood, they must reconcile and fight side by side - just like old times.

The mayor recruits Fred and Carrie to go door-to-door in Seattle to entice residents to relocate to Portland; a pedicab driver rustles up riders. Also: Peter and Nance make a stop at the Doily Shoppe in preparation for the opening of their bed-and-breakfast; and Toni and Candace try to find out who's behind a bad online review of their restaurant.

Tracy Morgan, Marv Albert, Everest

Courteney Cox, Joy Behar, Youngblood Hawke

Instead of duking it out for their match, former pinup models Mirajane and Jenny go head to head in a crowd-pleasing swimsuit pageant. But things get out of hand when all the wizard women join in!

Ash, Iris and Cilan take Cameron to Humilau so he can get his final badge.

In a nearly vacant town on a strange planet, the intrepid members of D-Squad discover Gregor, a clone commando who has lost his memory, and is toiling away as a dishwasher. The all-droid squad and their gruff leader must help Gregor regain his memory so they can steal a heavily guarded shuttle and return to the Republic.

Hal is sent through a rift between dimensions and finds himself in a parallel universe where his counterpart is... Steam Lantern, who battles the evil Lord Nigel in a 19th century Victorian setting.

The team goes on a mission to rescue its missing comrades, and discovers that the Reach is allied with the Light and responsible for the abduction of dozens of teenagers... and plans to use Blue Beetle to further their invasion plans.

Four new student nurses called Ally, Aoife, Jamie and Robyn face a difficult first day in the ED, as they find it hard to cope with the devastating effects of a shocking coach crash.

Jonathan is joined on the show by Jeremy Piven, Sarah Millican and David Tennant.