A man from Torrance, CA gets the Sharks in the holiday spirit with his rent-a-live Christmas tree service, which hires war veterans to maintain and deliver the trees, creating approximately 200 jobs during the holiday season. An enthusiastic woman from East Hampton, NY asks the Sharks to invest in her fudge that is gluten-free, but not glutton free. The Sharks tell two college students from Santa Monica, CA studying business that they may have a lot to learn when it comes to their fashion accessory that holds a cell phone on your leg. Also, two longtime friends and moms from Los Angeles believe their kids' indoor/outdoor play and party space is a perfect franchise opportunity. Singer-songwriter John Rich surprises entrepreneur Travis Perry from Dothan, AL, during an update for Chord Buddy, a training tool for beginning guitar students which Robert Herjavec invested in during Season 3.
Season 4 Episode 12 of Shark Tank resulted in a 1.80 rating in the 18-49 demographic.
Shark Tank follows aspiring entrepreneurs as they present various business ideas to moguls (known as "the sharks") in hopes of landing an investment in their ideas. Each week, ambitious entrepreneurs present their breakthrough business concepts to ruthless investors to convince them to invest in the concept.