The Case of the Negligent Nymph Perry Mason : Season 1 Episode 12

Perry Mason and Paul Drake are on a fishing trip when they spot a young woman named Sally Fenner being pursued by vicious guard dogs on an island estate. The only way Sally can avoid being chewed up by the dogs is to jump into the water and swim for it. Perry and Paul pull Sally out of the drink and Perry ends up defending her on a murder charge.