Dir: Frederik Du Chau. US. 2007. 83mins.With one paw in the comic-book action genre and one in the mawkish family arena, Underdog is a lovable mutt that could have benefited from better breeding. This live-action reinvention of the 1960s cartoon works best when lightly spoofing the conventions of superhero cinema, but the film goes to the dogs thanks to a drab story and frequent stabs at heartwarming bromides.