we're not sure whether the killer whale had put him up there or he somehow escaped their clutches. perhaps they're training the young, the young orca. who knows. >> amazingly, the seal reappears unharmed and very much alive. >> i couldn't believe the seal was going to escape. watching these animals, though, really is magnificent. >> chalk one up for the underdog. coming up -- a 15-year-old surfer battles not one but two great whites. >> quite lucky it didn't bite my head off. >> a cage is no match for this two-ton killer shark. a nurse shark sends a man to the emergency room. when "caught on camera: into the deep" continues. ways wins.