This was the last trip in the road comedies that Bob Hope, Bing Crosby, and a bevy of female stars that featured Dorothy Lamour once made famous. In this road to Hong Kong and parts far beyond, Chester and Harry (Hope and Crosby) are a couple of failed vaudeville stars looking for a way to riches in the confidence game. Chesters memory goes kaputz, and the two end up involved with Diane (Joan Collins), a spy looking for a secret formula, and a bunch of hoodlums who plan on sending up a rocket to the moon with special equipment allowing them to rule the planet earth. The pair of heroes gets caught in the rocket instead of the originally intended monkeys, and the monkey business continues in outer space -- where it seems to be all along. In this mixed collage of events, several stars pop up in cameo roles: Peter Sellers, Dean Martin, David Niven, Frank Sinatra among them. ~ Eleanor Mannikka, All Movie Guide