When does Groovie Goolies return?

Groovie Goolies is an American animated television show that had its original run Saturday mornings on CBS between 1970 and 1972. Set at a decrepit castle, the show focused on its monstrous but good-natured and mostly friendly inhabitants. Created by Filmation, it was an original creation of the studio; its characters would cross over with Filmation's Archie Comics adaptations.
Most of the Goolies were (in look and sound) pop-culture echoes of the classic horror-film monsters created in the 1930s and 1940s. Shows consisted of fast-cut sequences of pun-filled jokes and short skits.