Underdog works best when spoofing superhero conventions, but the film goes to the dogs thanks to a drab story and frequent stabs at heartwarming bromides.

At just over 80 minutes it feels not so much like a proper film as a piece of extended filler for slow afternoons on Disney's TV channels.

Despite the talent on show, there's little to distinguish this from any other bland family comedy.

An odd little time capsule, and that’s better than nothing. Barely.