Happy Birthday, Scooby-Doo

"Happy Birthday, Scooby-Doo" is the first episode of The New Scooby-Doo Mysteries.

Premise
The kids head to the TV station ZPOP to surprise Scooby, who thinks they have forgotten his birthday. When there, Scooby is surprised with "This Is Your Life Scooby Doo", hosted by Mark Winkendale. Special surprise guests include Velma, Freddie, and Mrs.Vandereel, whom they helped by solving the mystery of the Red Skull Curse. Before too long the Red Skull comes back and steals the Last Hope Diamond again, but is it really Freddie as everyone seems to believe?

Cast and Characters

 * Don Messick as Scooby-Doo and Scrappy-Doo
 * Casey Kasem as Shaggy Rogers
 * Heather North as Daphne Blake