>> we were out in the middle of the ocean. how did this dog get here? here's an added problem to the situation. >> alex's first priority is rescuing tina and paul. he swims with priscilla back to the boat and focuses on tina. meanwhile priscilla is fighting her own battle with the waves. on his third attempt, alex gets the harness around tina and they hoist her up. >> once i started to be lifted i thought this is great. this is my rescue. >> by now, the boat is nearly under water entirely. and the dog is nowhere in sight. paul is bleeding badly from a cut on his arm as alex secures his hoist up. the couple watches as the "tormenter" sinks presumably with priscilla. >> the paramedics couldn't see priscilla anywhere around the boat. it appeared all had been lost. >> but as the chopper turns to