The Bannister family's new addition, Zeus (voiced by Mario Lopez of TV's SAVED BY THE BELL), the yellow Labrador, appears to be less than the dependable guard dog the family needs. However, when two burglars set out to break into the Bannister's home while they're away for Christmas, Zeus seizes the chance to be a hero, proving every dog - even this one - has his day. Dean Cain (TV's LOIS & CLARK), Gary Valentine (TV's THE KING OF QUEENS), Elisa Donovan (CLUELESS, TV's SABRINA THE TEENAGE WITCH), Mindy Sterling (AUSTIN POWERS), and Adrienne Barbeau (MAUDE, CARINVALE) also lend their voices in this heart-warming animated holiday movie.