An episode from the 1966–1967 season called "Lucy Flies to London" served as the basis for a standalone one-hour special called "Lucy in London", which featured Ball with guest stars Anthony Newley and the Dave Clark Five. Much of the "Lucy Flies to London" episode, which centered around Lucy’s lack of experience in air travel, was based on a unsold pilot shot in 1960 that was written by Bob Carroll, Jr. and Madelyn Pugh Martin Davis. It starred Lucille Ball and Gale Gordon. Desi Arnaz was the director.