Mork & Mindy

The second season (1980) of Mork & Mindy features an episode titled "Looney Tunes and Morkie Melodies."

In this episode, Mork (played by Robin Williams) attempts to help his friend Nelson who is having a hard time reaching an audience with his campaign speech. With his speech scheduled to air on a Saturday morning, Mork attempts to turn the broadcast into something that will appeal to the young audience watching at that time. Included in his plan is a short opening segment -- Mr. Mork -- obviously modeled after Mister Rogers.