A Night in Casablanca storyline for the film was intended to be a direct parody of "Casablanca," with the characters having similar-sounding names to the characters and actors in the 1942 film. Groucho Marx has said that an early draft named his character "Humphrey Bogus", a reference to the leading actor in "Casablanca," Humphrey Bogart. Warner Bros. did not actually litigate, or even threaten to litigate, but it did issue a formal inquiry to the Marx Brothers concerning the plot and script of the film. The Marx Brothers exploited the situation for publicity, making it appear to the public that a frivolous lawsuit was
Casablanca (film) elements can be criticized, citing unrealistic special effects and the stiff character/portrayal of Laszlo. Critic Leonard Maltin considers "Casablanca" to be "the best Hollywood movie of all time." Rick, according to Rudy Behlmer, is "not a hero ... not a bad guy": he does what is necessary to get along with the authorities and "sticks his neck out for nobody". The other characters, in Behlmer's words, are "not cut and dried" and come into their goodness over the course of the film. Renault begins as a collaborator with the Nazis who extorts sexual favors from refugees and has Ugarte killed.