Underdog HBO Max's Description: "'There's no need to fear…Underdog is here!' The heroic cartoon canine is brought to the big screen in this live-action comedy that finds the super-powered beagle trying to save his city from the destructive clutches of a mad scientist." Watch Underdog on HBO Max here! More Family Movies Your Kids Can Stream on HBO Max Air Buddies Beverly Hills Chihuahua 2 Beverly Hills Chihuahua 3: Viva La Fiesta! Santa Buddies The Search for Santa Paws Snow Buddies Space Buddies Spooky Buddies Treasure Buddies Image Source: Everett Collection