Original: Although the format of the show and the cast (and ages) of characters have varied significantly over the years, the most familiar versions of the show feature a talking dog named Scooby Doo and four teenagers or young adults: Fred "Freddie" Jones, Daphne Blake, Velma Dinkley, and Norville "Shaggy" Rogers.
Simplified: Though the show, people in it, and their ages have changed, the most familiar versions of the show have a talking dog named Scooby-Doo and four teenagers: Fred "Freddie" Jones, Daphne Blake, Velma Dinkley, and Norville "Shaggy" Rogers.