A lab accident gives a beagle named Shoeshine some serious superpowers -- a secret that the dog eventually shares with the young boy who becomes his owner and friend.
Shoeshine / Underdog (voice)
Jason Lee
Dan Unger
Jim Belushi
Cad
Patrick Warburton
Mayor
John Slattery
Dr. Simon Barsinister
Peter Dinklage
Riff Raff (voice)
Brad Garrett
Molly
Taylor Momsen
Polly Purebred (voice)
Amy Adams
Jack Unger
Alex Neuberger
Security Guard
Larry Vigus
Cop
Bates Wilder
Police Sergeant
Frank Ridley
Small Boy
Alexander 'Alex' Garde
Police Secretary
Diana Shneider
Principal
Samantha Bee
Observer
John Franchi
Referee
Ezra Buzzington
Jay Leno
Jay Leno
Diana Flores
Susie Castillo
Supershep 1 (voice)
Phil Morris
Supershep 2 (voice)
Michael Massee
Little Brown Dog / Supershep 3 (voice)
Cam Clarke
Bulldog / Supershep 4 (voice)
John DiMaggio
Crazy Dog (voice)
Danny Mastrogiorgio
Astronaut (voice)
Jess Harnell
Office Worker
Susan Garfield
Police Chief
Timothy Crowe