History is made when all five Sharks join forces to make a deal. Also, a recent college graduate from Indianapolis, IN wants to turn inconvenience into opportunity with his ticketless coat check system; a man from Central City, CO wants the Sharks to invest in his belt buckle idea that doubles as a beverage holder; a licensed massage therapist from Phoenix, AZ takes a stand to reinvigorate the ancient art of body massage; and two women from Freehold, NJ believe they have a solution to the nationwide epidemic of bedbugs. Also, an update on Rick Hopper from Fullerton, CA and his Readerest eyeglass holder, which Lori Greiner invested in during Season 3.

When a man from Austin, TX pitches a so-called "cheaters app" -- which allows selected contacts to be hidden from view when calls come in -- the Sharks question and debate the morality of investing in an app that could be used to make it easier for people in relationships to cheat. Also, two business partners from Bedford, NH have top-ranked champion surfer Lakey Peterson demonstrate to the Sharks how their surf-inspired exercise equipment works; a dapper man from Acworth, GA pitches a personal style system that will help the Average Joe look and feel like an alpha male; and two women from Omaha, NE hope to make a sweet deal where customers can design their own personalized ice cream and gelato flavors. In addition, there will be an update on the recent success of Tower Paddle Boards, a business Mark Cuban invested in with Stephan Aarstol from San Diego, CA.

Professional dancers Jonathan Roberts and Anna Trebunskaya demonstrate their posture correction device; entertainment reporter Robin Leach and a designer from Florida present stone-studded leather jewelry; a gluten-free cookie business.

An unemployed man and his pregnant wife pitch a party-favorite chicken dip; a professional football player's spring-loaded laundry hamper, a technophobe presents his wireless gadget that helps people keep track of their keys or cell phone.

A line of dresses made of pillowcases; a unique spatula; vitamin oral sprays; energy-boosting waffles.

Professional football player Brandon Jacobs hopes to help a woman find success with her protein-infused energy drink; a lobster roll food truck; eco-friendly cleaning products; colorful drink insulators; follow-up on a lip balm idea.

A modern-day slip business; a scrubbing tool; dog-friendly frozen yogurt; an electric unicycle; an update on the "Lollacup."

Seth MacFarlane shows his support for a man who designed a new fly trap; multi-functional child cover; food storage container; followup on a manicure system.

A motorized vehicle suit; comedy writer Bruce Vilanch presents a computer instruction project; sugar-free candy chips; an update on a foldable guitar.

An energy and nutritional supplement designed and tested by active members of the military; a new way to shop for bridal wear; a wine tasting cruise.

A rent-a-live Christmas tree service; gluten-free fudge; cell phone accessory; indoor/outdoor play space; singer John Rich surprises an entrepreneur.

Mark and Lori offer an entrepreneur $1 million; enclosed tabletop food screen; a beer and arcade game cabinet; peel-off face paint transfer; hair care products for children; update on Squirrel Nut Butter.

A capsule that keeps beverages hot for an extended period; a new way to clean stuffed toys; reinventing the ice cream experience.

Sandals for barefoot runners; a magnetic sound enhancer that doesn't need power; a website that creates personalized soundtracks for children; an update on "Cousins Lobster.

A successful entrepreneur returns with a new business idea; hand-held cooler; environmentally friendly dry cleaning bag; chewing tobacco alternative.

Kevin O'Leary makes a $1 million offer; six young inventors aged 12 to 18 present their unsafe-driving detector; a mini-muffin that is a twist on s'mores; an online chat therapy business.

Fortified, sugar-free nut butters; an acupressure wrist band; an at-home tattoo removal device; an update on inventors who created surf-inspired fitness equipment.

A workout program that teaches people how to exercise in their heart rate zone; throwing dance parties for kids with a traveling disco van; a damage-proof cell phone case; an update on The Painted Pretzel.

Two entrepreneurs try to solve the "carmuter triangle"; an 18-year-old seeks an investment in her natural skincare line of sugar scrubs; shrink-wrap gift bags.

Gourmet meat business; a cooler with interior LED lighting; full-body spandex suit; an advance filter water bottle; follow up on a play and party space for kids from season four.

A fishing bobber made from a shotgun shell; homemade cupcakes in a jar; generating electricity through walking; a belt with no holes; a fitness-based dance program.

Frozen concentrated gumbo brick; a bird feeder that shocks squirrels; artisan coffee subscription business; wooden home and kitchen items; ECreamery update.

Teaching kids how to ride a bike that doesn't have pedals; a movie about motorcycle racing; a hot-pink food truck run by beautiful women; fun photo booths.

Two women pitch their military-inspired jewelry line; traditional British scone; custom furniture; door-to-door luggage pickup service; update on the Scrub Daddy cleaning tool.

An app that provides international travelers with access to live translators; all-natural dog treats; a dating website designed to attract quality singles; gourmet grilled cheese and tomato sandwiches; Dr. Heinz Doofenshmirtz ("Phineas and Ferb").