When does Birdman and the Galaxy Trio return?

The series debuted on NBC on September 9, 1967, and ran on Saturday mornings until January 20, 1968. Harvey Birdman, Attorney at Law, premiered on Adult Swim on September 2, 2001, concluding on July 22, 2007 after four seasons. A spin-off series, Birdgirl, premiering on April 5, 2021.