Duckman: Private Dick/Family Man S03E06 - A Room with a Bellevue

Duckman gets placed in a mental institution after pleading temporary insanity to a charge of public ranting. He likes the strict regimentation of the institution (compared to the anarchy and chaos of outside the institution) so much that he decides to have himself permanently committed. Cornfed comes to rescue Duckman from the institution, but is to late as he has already been given shock treatment. Luckily Cornfed has a book on brain surgery and gets Duckman back to 'normal'.