He is now best remembered for his 1960s series "Here's Harry", later re-titled "Harry Worth", which ran for 10 years and over 100 episodes (the longest running British sitcom of the time, and still one of only a handful to run for over 100 episodes). The opening titles of "Harry Worth" featured Worth stopping in the street to perform an optical trick involving a shop window: raising one arm and one leg which were reflected in the window, thus giving the impression of levitation. Reproducing this effect was popularly known as "doing a Harry Worth". The shop window sequence first used in "Here's Harry" was filmed at St Ann's Square, Manchester, at Hector Powes tailor's shop. The idea for this was suggested by Vince Powell, who had done it himself as a child.