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A March 1970 Daily Variety news item announced that director Rod Amateau's first novel, The Operator (co-written with Budd Robinson), which was to be published that year in the United Kingdom, had been optioned by London-based producer Art Cooper. Shooting was set to take place in the United States, and Paul Burke, Ian MacShane and singer Jack Jones were mentioned as possible stars. Amateau had worked with producer Josef Shaftel for an earlier Cinerama release, The Statue.
A May 1971 Daily Variety news item announced that British company The Hemdale Group was financing Shaftel's production of Where Does It Hurt? and that the film was still to be shot completely in the U.S, but Hemdale was not listed in any other source, and the extent of their participation in the released film has not been determined. Although a August 30, 1971 Hollywood Reporter news item announced that Amateau and co-producer Bill Schwartz had "signed" Rosalee Berman as the picture's associate producer, filming had been completed by that time, and the extent of Berman's contribution to the picture, if any, has not been determined.
During production, a August 3, 1971 Daily Variety item noted that the Screen Extras Guild, protesting the "reverse-runaway production" aspect of the U.K. production being filmed in the U.S., picketed the film while it was shooting at Producers Studio. Modern sources add the following actors to the cast: Dodie Warren, Beverly Moore, Lynn Cartwright, Jackie Russell, Richard Hoyt, Steve Mitchell, Ed Begley, Jr., Joe Corey, Mark Evans, Jimmy Cross, Anitra Ford, Lenore Kasdorf, Paul Gleason and Uschi Digard.