What was the first Scooby-Doo spin-off series, which premiered in 1972?

The first Scooby-Doo spin-off series was The New Scooby-Doo Movies.

The series premiered in 1972, following the original Scooby-Doo, Where Are You! It kept Mystery Inc. at the center but added a distinctive format: the gang teamed up with famous fictional characters and celebrities in feature-length television adventures.

Guest stars included Batman and Robin, the Addams Family, the Harlem Globetrotters, and the Three Stooges. This crossover approach helped expand Scooby-Doo beyond its original mystery formula and established guest appearances as an important part of the franchise’s early history.

The title can cause confusion because the episodes were made for television rather than theatrical release. Later shows, including The Scooby-Doo Show, were separate series rather than continuations under the same title.