From PBS KIDS - Martha to the Rescue: Martha is inspired by her favorite show, "Courageous Collie Carlo." Unfortunately, her attempts to become a doggie hero don't quite work out the way she plans. In the end, both Martha and Helen discover they can be courageous when it really matters. Martha Camps Out: Ronald finds out that Helen and Alice plan to go camping and warns them about Big Minnie, a mythical monster who lives in the woods. Undeterred, the campers set off. After all, everybody knows Big Minnie's imaginary. Or is she?