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- Season 4 overviewSep 30, 2009-Jun 7, 201021 episodesSeason 4 episodes21. Greenvention Special Jun 7, 2010
- Three of the best, brightest and greenest entrepreneurs present their business ideas.
- 20. The Road to Riches Mar 17, 2010
- Defining moments in the lives of the Dragons.
- 19. S4 E19 Mar 10, 2010
- A rock business fighting the recession; a vodka business dances for dollars.
- 18. S4 E18 Mar 3, 2010
- The dragons go in on a million dollar offer; an eco-friendly business; a harness for puppies.
- 17. S4 E17 Feb 10, 2010
- The Dragons are treated to dessert; a condom that is safe for the environment; a board game.
- 16. S4 E16 Feb 3, 2010
- A diaper delivery service; a scale; a boating business; a mailbox pitch.
- 15. S4 E15 Jan 27, 2010
- A fruit basket; a revealing board game; an organic juice business.
- 14. S4 E14 Jan 20, 2010
- A computer mouse; a helmet for safety and style; a spa business.
- 13. S4 E13 Jan 13, 2010
- A sauce business; a spray; a dress that provokes disagreement.
- 12. S4 E12 Jan 6, 2010
- A new tool; a top home designer is willing to put her name on the line.
- 11. S4 E11 Dec 9, 2009
- A winter hat; futuristic living goes up in smoke; a familiar face braves the Den again.
- 10. S4 E10 Dec 2, 2009
- Diamonds made from an unlikely source; an underwear company; a board game.
- 9. S4 E9 Nov 25, 2009
- A sparkly swimsuit; a holistic healer; a Website that promotes recycling.
- 8. S4 E8 Nov 18, 2009
- An offer makes fishermen greedy; DJ school; a fitness show for toddlers.
- 7. S4 E7 Nov 11, 2009
- What some of the most memorable entrepreneurs have been up to since their experience in the Den.
- 6. S4 E6 Nov 4, 2009
- A snowboard; an auto repair shop; table hockey.
- 5. S4 E5 Oct 28, 2009
- Hopefuls try to turn dough into dollars; Arlene supports a bra business; Elvis impersonators.
- 4. S4 E4 Oct 21, 2009
- A casino dealer; a medical marijuana business; cell phone users.
- 3. S4 E3 Oct 14, 2009
- A dance troupe shakes things up; an entrepreneur begs for cash; a tattoo business; lunchtime.
- 2. S4 E2 Oct 7, 2009
- Twins present a line of lip gloss; a husband and wife duo; an eco-friendly clothing line.
- 1. S4 E1 Sep 30, 2009
- Students strip down; Kevin upgrades a travel website; the dragons get feisty over a business.