They're cunning. They're stealthy. They're waging a top-secret, ultra-high-tech struggle for global domination right under our noses. They're... Cats and Dogs! Witness this epic "tail" of what happens when an eccentric professor (Jeff Goldblum) makes a discovery that could tip the age-old balance of pet power. Now an inexperienced young beagle pup (voiced by Tobey Maguire) will undertake the ultimate mission impossible: saving humankind from total catastrophe!