National Lampoon's The Don's Analyst

The Godfather, Don Vito Leoni (Loggia) runs his "family business" as if nothing in the world has changed, but it has. Everyone thinks he must be completely off-his-rocker when he decides to go legit. His sons will lose their gushy lifestyles if their clinically depressed father doesn't come to his sensces so the boys kidnap a shrink (Pollak) and order him to make their father think straight.