An inner-city teacher tries to sell the Sharks on his unique way to get children to learn; the owner of a gourmet food business watches the Sharks fight for a piece of the action; an astonishing offer is made for one life-saving idea.

An entrepreneurial novice makes a less-than-stellar presentation to the sharks; a father-son duo pitches a proposal for a revolutionary new musical product.

An entrepreneur originally from Ghana wants an investment for an Internet business; a man from California wants to franchise his graffiti-removal business.

Three of the sharks make a deal for an innovative Internet company, but before the deal can be sealed, a battle ensues and one of the sharks is ousted.

A young Chicago entrepreneur plays hardball with the sharks while seeking funding for an innovative Internet business.

A housewife from Charleston, S.C., charms the male sharks; a college student pitches a product made from soy that he creates in his mother's kitchen.

A young entrepreneur's overconfidence could blow a deal with the sharks; Kevin O'Leary follows an entrepreneur out of the Shark Tank to get the last word after being outbid by another shark.

A veterinarian's product claims to prevent cancer in pets; virtual arcade; a Texas designer pitches a line of fashionable clothing for women.

A man wants an investment from the sharks to create an extension of his already successful business; a urologist has an unusual business proposal.

A man wants an investment from the sharks to create an extension of his already successful business; a urologist has an unusual business proposal.

Things get heated when the sharks ask a husband-and-wife team to clarify the actual value of a childcare business; a chef's salad dressing mix is removed from store shelves because of offensive packaging; a golf ball cleaner.

Two Texas bicyclists have an idea for a portable hand degreaser; a college student is passionate about his environmentally friendly clothing line; the sharks find out if lifelong entrepreneur Cactus Jack lost at least 35 pounds to seal a deal.

A California entrepreneur wants to bring back old-fashioned ice cream men; a couple's pitch is about providing legal services at a coffee house; an update on the sharks' venture with an Arizona woman and her unique plush toys.