The 17 Aug 1922 FD noted that Harold Lloyd had completed Doctor Jack. It was his first feature-length comedy produced under his new contract with Pathé, according to the 23 Sep 1922 Exhibitors Herald. The new deal created a bidding war between theaters for Harold Lloyd comedies, and in Los Angeles, CA, the Million Dollar Theater on Broadway downtown garnered the rights to screen Doctor John, the 25 Nov 1922 Moving Picture World announced.
       The film’s credits appear on a physician’s prescription chits marked “Rx.” The name of the millionaire is not listed, but a visible document halfway through the film identifies him as the “Honorable Charles F. Haskell” of 32 Bonnie Brae Drive. Intertitle cards identify his lawyer as “Jamison.” The woman who portrays Jamison’s mother is not listed in opening credits, but she can be identified as Anna Townsend, who played Lloyd’s grandmother in his previous film, Grandma’s Boy (1922, see entry). Also unlisted is Mickey Daniels, a visually distinctive child actor with buckteeth and freckles who appeared in dozens of films.
       According to John Bengtson's Silent Visions: Discovering Early Hollywood and New York Through the Films of Harold Lloyd, one of Doctor Jack’s primary locations was a mansion at 3344 Country Club Drive in Los Angeles, CA, which Lloyd had already used in Haunted Spooks (1920, see entry). Lloyd also used Higuera Street in what was then a rural part of Culver City.
       Pathé released Doctor Jack on 26 Nov 1922, the 9 Dec 1922 Exhbitors Herald noted, but the Strand Theater on Broadway in New York City booked the film a month later to open for two weeks beginning Christmas Eve.
       The 30 Dec 1922 Moving Picture World reported that Harold Lloyd fans were still standing in line for Doctor Jack during its third week at the Majestic Theatre in Portland, OR. Receipts for the first two weeks equaled those of the first four weeks of Lloyd’s previous film, Grandma’s Boy (1922, see entry).