As curious as George, as lovable as Magilla Gorilla, as big as a pony, and able to communicate thoughts far more effectively than mortal dogs, Scooby-Doo bounded across the Saturday morning cartoon threshold in 1969 like an overeager Great Dane on a mission. In fact, he was an overeager Great Dane; and his missions -- solving mysteries, usually ones cloaked in the supernatural -- helped vault him into to realm of Hanna-Barbera's most celebrated characters. And since the Hanna-Barbera (William Hanna and Joseph Barbera) stable includes such giants as the Flintstones, the Jetsons, Yogi Bear, and Huckleberry Hound, his pedigree is rare indeed. Entering the TV arena as Scooby-Doo Where Are You?, the show offered kids both adventure and comedy, and reflected the youth of the time in its nomadic band of sleuths: Fred (voiced by Frank Welker) is the would-be prom king; Daphne (Stefanianna Christopherson) is the accident-prone ditz; Shaggy (Casey Kasem) is the dork with the munchies; and Velma (Nicole Jaffe) is the levelheaded brain. Packed into their psychedelic "Mystery Machine" with a ravenous, almost-verbal canine ("Rooby-roo!" means "Yes, I concur"), the group defined goofy cartoon cool. Scooby-Doo's Original Mysteries includes the first five mysteries from the beloved original 1969 series -- "What a Night for a Knight," "Hassle in the Castle," "A Clue for Scooby Doo," "Mine Your Own Business," and "Decoy from a Dognapper." Combining the adventure of '50s monster cheapies with a youth-oriented lunacy recalling The Many Loves of Dobie Gillis, the show affords cartoon audiences a dose of mystery-light -- funky, formulaic romps featuring ghosts, ghouls, secret passages, and a rogue's gallery of rubber-masked villains. Over time and 14 different series, Scooby-Doo has barked up a whole lot of different trees, some of them wrong. But the original Scooby world contained in this collection endures, a welcome blast of time-capsule nostalgia for adults, a great show with a great Great Dane for kids.