Shark Tank

Contestants present business ideas to five multimillionaires, who will either invest or pass.

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Season 3, Episode 15 Episode 312

First Aired: May 18, 2012

Pitches in the Season 3 finale include a residential lock system that incorporates a key into a mobile phone; a home gym with nitrogen-gas pressure as resistance; antiaging products inspired by their developer's older girlfriend; and recycled sneakers. Also: an update on a Web site that sells VIP treatment at nightclubs and special events.

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