Things get heated when the sharks deal with a husband-and-wife team.

An Illinois perfume peddler; a San Francisco woman selling luxury soap; an Alabama guitar teacher who says his learning system is unique; a “Mr. Mom” from Baton Rouge, La., with accessories for blue jeans. Also: an update on a gourmet seafood business from Season 2.

The sharks attempt to make the big deal.

Ideas include a training system for salespeople, a management system for cargo trucks, family-friendly Las Vegas entertainment and a cat-portrait business. Also: a follow-up on a Season 2 potty-training product for cats.

NBA champion Bill Walton helps a triathlete pitch his idea for a unique water bottle; a ghostwriter from California seeks a business investment; two women from Minnesota present their online business that helps people plan their own funerals.

A towel that provides coverage to change out of a swimsuit in public; a sweater and quilt invention; a way to maximize a wine's life; healthy cake mix

Products include jewelry designed by a 10-year-old and a wedge pillow to allow women with large breasts to sleep comfortably on their stomachs. Also: a way to deal with missing garbage-can lids; a reinvention of “the tea experience”; an update on a peel-and-stick light-up decal for car windows

The Sharks tear into the business idea of a Phoenix, AZ man who wants them to invest in a watch he claims provides health benefits; a stay-at-home mom from Gilbert, AZ could lose her gourmet pretzel business if she leaves the Tank without an investor; a man from Bozeman, MT with a no-tools-required furniture system hopes he can assemble a deal; and an inventor from Fullerton, CA has a small but powerful idea that could make him a millionaire. Also, Johnson Barley from Broken Arrow, OK, whose Original Man Candle did not spark a deal with the Sharks in Season Two, talks about his business since his appearance.

Will Sharks Barbara and Kevin seal a deal with a kiss when two guys from Utah ask them to sample their flavored mix-and-match lip balm kissing product? A self-professed gadget guy from Ketchum, ID calls a Shark’s lucrative offer “insane” regarding his revolutionary clothing item; during their heated negotiation, the entrepreneur calls Apple Computers co-founder Steve Wozniak for advice. A newlywed from Rockledge, FL who lost her job the day before coming to the Tank hopes the Sharks will invest in her and her husband’s line of innovative, clever kitchen products; and a husband from Derby, KS pitches the Sharks a heat-recycling device which his wife calls “common sense in a box.” Also, a follow-up on Greenville, SC’s Kim Nelson’s homemade Daisy Cakes, which Barbara invested in during Season 2.

Singer Ingrid Michaelson joins a would-be entrepreneur who's pitching high-tech music software. Other pitches include an "instant" solution for cellulite; a sales distribution method for a stand-up paddleboard; and a wine-aerating device. Also: a follow-up on a Season 3 magnetic clip to secure eyeglasses.

A returning entrepreneur asks Boston Beer chairman Jim Koch for advice on his wine-in-a-cup business. Other pitches include handmade cookies; T-shirts with motivational messages that become visible when the wearer perspires; and products made from the waste emitted from the entrepreneur's generator.

Pitches include body jewelry, a movable basketball-training apparatus, an organic skin-care product and a “Rent-a-Grandma” business. Also: an update on a Season 1 barbecue restaurant.

Tempers flare and insults fly when the Sharks fight over an innovative three-in-one nail polish invented by a mother of six girls from West Hartford, CT, who had to sell her engagement ring to start her business. A husband and wife team of feisty New Yorkers believe they have the next big thing in women's accessories; two Pittsburgh hockey moms pitch their home-grown tank top business with interchangeable straps; and a couple from Pasadena, CA insist that their unique sippy cups be manufactured in the USA to maintain quality. In a follow up story, the entrepreneurs behind Talbott Teas from Chicago, IL have big news about a deal with Jamba Juice after their TV appearance.

Billy Blanks Jr. asks the sharks to invest in a dance fitness program; a music producer seeks an investment in a rock band; two college students pitch their flavored peanut butter business.

The sharks fight for a chance to go into business with an inventor; two fitness trainers pitch their idea for a unique home gym; a young man seeks an investment in his age-defying products.