The 'mother' shark breaks out of the filtration pipe, forcing Mike and Kay to hightail it back to the control room while Cindy and Sandy distract the shark. Meanwhile, the air pressure is restored to the tunnel in which the visitors are trapped, and they are able to escape. However, the shark turns her attention to the control room and smashes her way through the glass, flooding the room. Calvin (Louis Gossett Jr.) and his technician manage to escape. Mike and Kay, still in their SCUBA gear, put on their masks and don their respirators. Mike notices the remains of Philip FitzRoyce (Simon MacCorkindale), including one of his grenades, still hanging in the shark's mouth, so he uses a pole to pull the pin, blowing up the shark. Mike and Kay swim to the surface of the lagoon, and Kay signals to the dolphins. Cindy shows up, but Sandy is nowhere to be seen. Suddenly, Sandy leaps out of the water, assuring Kay that both of her both dolphins are safe and sound.