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- Season 4 overviewSep 14, 2012-May 17, 201326 episodesSeason 4 episodes26. S4 E26 May 17, 2013
- An app that provides international travelers with access to translators; all-natural dog treats.
- 25. S4 E25 May 17, 2013
- Military-inspired jewelry line; traditional British scone; custom furniture.
- 24. S4 E24 May 10, 2013
- Teaching kids how to ride a bike that doesn't have pedals; a movie about motorcycle racing.
- 23. S4 E23 May 3, 2013
- Frozen concentrated gumbo brick; a bird feeder that shocks squirrels; coffee subscription business.
- 22. S4 E22 Apr 26, 2013
- A fishing bobber made from a shotgun shell; homemade cupcakes in a jar.
- 21. S4 E21 Apr 5, 2013
- Gourmet meat business; a cooler with interior LED lighting; full-body spandex suit.
- 20. S4 E20 Mar 29, 2013
- Solving the "carmuter triangle"; a natural skincare line of sugar scrubs; shrink-wrap gift bags.
- 19. S4 E19 Mar 8, 2013
- A workout program; throwing dance parties for kids with a traveling disco van.
- 18. S4 E18 Mar 1, 2013
- Fortified, sugar-free nut butters; an acupressure wrist band; an at-home tattoo removal device.
- 17. S4 E17 Feb 22, 2013
- Unique eyewear made of sustainable wood; a camouflage clothing line for duck hunters.
- 16. S4 E16 Feb 15, 2013
- Kevin makes a $1 million offer; young inventors aged 12 to 18 present their unsafe-driving detector.
- 15. S4 E15 Feb 8, 2013
- A successful entrepreneur returns with a new idea; hand-held cooler; chewing tobacco alternative.
- 14. S4 E14 Feb 1, 2013
- Sandals for barefoot runners; a magnetic sound enhancer that doesn't need power.
- 13. S4 E13 Jan 11, 2013
- A capsule that keeps beverages hot for an extended period; a new way to clean stuffed toys.
- 12. S4 E12 Jan 4, 2013
- Mark and Lori offer an entrepreneur $1 million; enclosed tabletop food screen; game cabinet.
- 11. S4 E11 Dec 4, 2012
- A rent-a-live Christmas tree service; gluten-free fudge; cell phone accessory.
- 10. S4 E10 Nov 16, 2012
- An energy and nutritional supplement designed and tested by active members of the military.
- 9. S4 E9 Nov 9, 2012
- A motorized vehicle suit; comedy writer Bruce Vilanch presents a computer instruction project.
- 8. S4 E8 Nov 2, 2012
- Animator Seth MacFarlane shows his support for a man who designed a new fly trap.
- 7. S4 E7 Oct 26, 2012
- A modern-day slip business; a scrubbing tool; dog-friendly frozen yogurt; an electric unicycle.
- 6. S4 E6 Oct 19, 2012
- Protein-infused energy drink; a lobster roll food truck; eco-friendly cleaning products.
- 5. S4 E5 Oct 12, 2012
- A line of dresses made of pillowcases; a unique spatula; vitamin oral sprays.
- 4. S4 E4 Oct 5, 2012
- An unemployed man and his pregnant wife pitch a party-favorite chicken dip.
- 3. S4 E3 Sep 28, 2012
- A posture correction device; stone-studded leather jewelry; a gluten-free cookie business.
- 2. S4 E2 Sep 21, 2012
- The sharks question the morality of a potential investment; a man presents a personal style system.
- 1. S4 E1 Sep 14, 2012
- All five sharks consider business propositions that include a ticket-free coat check system.