Marx Brothers appeared, sometimes with Chico and Zeppo caricatured, in cartoons starring Mickey Mouse, Flip the Frog and others. In the "Airwolf" episode 'Condemned', four anti-virus formulae for a deadly plague were named after the four Marx Brothers. In "All in the Family", Rob Reiner often did imitations of Groucho, and Sally Struthers dressed as Harpo in one episode in which she (as Gloria Stivic) and Rob (as Mike Stivic) were going to a Marx Brothers film festival, with Reiner dressing as Groucho. Gabe Kaplan did many Groucho imitations on his sit-com "Welcome Back, Kotter" and Robert Hegyes sometimes imitated both Chico
Zeppo Marx all four Marx Brothers equally — "When the "four" Marx brothers are on the screen, it's a riot" [emphasis added] — and went on to describe each of the brothers' unique style of comedy, and praised Zeppo as "the handsome but dogged straight man with the charisma of an enamel washstand." In her book "Hello, I Must be Going: Groucho & His Friends", Charlotte Chandler defended Zeppo as being "the Marx Brothers' interpreter in the worlds they invaded. He was neither totally a straight man nor totally a comedian, but combined elements of both, as did Margaret Dumont. Zeppo's importance