Chris Gronkowski from Colleyville, Texas, his brother Rob Gronkowski from the New England Patriots, and the rest of the Gronk brothers bring an insulated sports bottle to the Tank. Mark Cuban and Alex Rodriguez offer sage advice to a 17-year-old from St. Louis, Missouri, who devised a tool to quickly soothe foot pain; an entrepreneur from Santa Monica, California, with a nutrition and culinary background, has a sweeter way to eat a popular snack; and a man from Los Angeles, California, hopes to lock up a deal with his innovative way to keep belongings safe.
Season 9 Episode 4 of Shark Tank was watched by 4,640,000 viewers, resulting in a 1.10 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.