Lassie the dog famously saved her owner in almost every episode. Little Timmy was forever falling into wells or getting stuck in old refrigerators or whatnot. The fates wanted him dead and only Lassie kept Timmy alive. Certainly Cat Lassie wouldn't have done what this dog in Germantown, Wisconsin did (warning: auto-start video).
For unknown reasons, Crystal Lauer fell unconscious on her front porch. It was only 3°F outside. She was dressed in pajamas and a housecoat. So she was in great danger of freezing to death.
Johnny, her black Labrador Retriever, ran into the street, agitated. Officer Jeff Gonzalez spotted him from his patrol car. Johnny led the officer back to Lauer's porch, where he found the unconscious woman. She had been on that porch for about an hour. Thanks to timely medical intervention, she's now recovering in a local hospital.