When does Lippy the Lion and Hardy Har Har return?

Lippy the Lion and Hardy Har Har the hyena first appeared in The Hanna-Barbera New Cartoon Series on September 3, 1962, along with Wally Gator and Touché Turtle and Dum Dum. Mel Blanc used the same voice, personality and expressions he used playing the postman on the Burns and Allen radio show.