Mystery in Petbridge

 is the TBD episode of Season TBD of The Pet Adventures of Lego, being a crossover with Scooby-Doo.

Regular

 * Josh Keaton as Lego
 * Bill Fagerbakke as Wag
 * Tara Strong as Rose
 * Rob Paulsen as John
 * Grey DeLisle as Mattie and Daphne Blake
 * Dee Bradley Baker (uncredited) as Lego, Wag and Rose's vocal effects

Guest stars

 * Frank Welker as Scooby-Doo and Fred Jones
 * Matthew Lillard as Shaggy Rogers
 * Kate Micucci as Velma Dinkley

Credits

 * Writers: TBD
 * Storyboard Artists: TBD
 * Directed by: TBD