In 'Doug', what is the name of Doug's dog?

In 'Gravity Falls', in which state is the town of Gravity Falls located? In 'Hey Arnold!', what shape is Arnold's head often compared to? In 'Rugrats', who is the bossy three-year-old cousin? In 'Arthur', what kind of animal is Arthur Read? In 'Blue's Clues', what kind of animal is Blue? In 'Barney & Friends', what kind of creature is Barney? In 'Thomas & Friends', what kind of vehicle is Thomas? In 'Paw Patrol', what is the name of the boy who leads the pups?