Scooby-Doo 2: Monsters Unleashed Scooby-Doo 2: Monsters Unleashed Scooby-Doo 2: Monsters Unleashed is a 2004 American live-action/computer-animated family horror comedy film, based on the animated television series. It is the second installment in the "Scooby-Doo" live-action film series and a sequel to 2002's "Scooby-Doo", and was directed by Raja Gosnell, written by James Gunn and released by Warner Bros. Pictures. The film stars Freddie Prinze Jr., Sarah Michelle Gellar, Linda Cardellini, Matthew Lillard, Seth Green, Tim Blake Nelson, Peter Boyle and Alicia Silverstone, with Neil Fanning reprising his role as the voice of Scooby-Doo. Mystery Inc. (Fred, Daphne, Velma, Shaggy and Scooby-Doo) attend the
Scooby-Doo the Night" on a flight to one of the development meetings, and decided to rename the dog "Scooby-Doo" and re-rechristen the show "Scooby-Doo, Where Are You!" The revised show was re-presented to CBS executives, who approved it for production. The first episode of "Scooby-Doo, Where Are You!" "What a Night for a Knight" debuted on the CBS network Saturday, September 13, 1969. The original voice cast featured veteran voice actor Don Messick as Scooby-Doo, radio DJ Casey Kasem (later host of radio's syndicated "American Top 40") as Shaggy, actor Frank Welker (later a veteran voice actor in his own right)