Lori Greiner, Daymond John, and Kevin O'Leary start a bidding war over Mike Sewell's door accessory company StepNpull, with each Shark lowering their equity in a race for a deal. Meanwhile, Mark Cuban keeps telling Mike to stick to his guns, and maybe even walk away. Will StepNpull shut the door on the Sharks? From season 12, episode 19 of 'Shark Tank.' Watch 'Shark Tank' FRIDAY 8|7c on ABC, streaming, on demand, and Hulu.