Rotten Tomatoes: Underdog - Review links, synopsis, critical consensus, credits, photos, trailers, news, box office numbers, and a forum. IMDb: Underdog (2007) - Photo gallery, plot outline, cast list, trivia, quotes, user reviews, and a message board. Wikipedia - Article describing plot, cast, and merchandise. New York Daily News - Review, by Jack Mathews: "Made for viewers old enough to appreciate a talking pooch but too young to read or write about it." [Rating: 2.5 out of 4] MovieWeb: Underdog (2007) - Facts and figures, synopsis, videos, photos, and news. IGN Movies: Underdog - Provides information, news, videos, and a photo gallery.