Good Neighbor Sam is a 1964 American Eastman Color screwball comedy film co-written and directed by David Swift, based on the 1963 novel of the same name by Jack Finney.

The screenplay was the motion picture debut of James Fritzell and Everett Greenbaum, who had written many American television sitcoms[citation needed] including The Andy Griffith Show and Mister Peepers (created by David Swift).

An extremely important client, Simon Nurdlinger, is considering taking his business elsewhere when he believes there are no "family men" working at Sam's agency.

Having never met Howard, Irene and Jack seem convinced, but hire a private investigator who begins watching the couple with a telescopic surveillance camera hidden in a phony workmen's truck nearby.

The film, set in San Francisco, makes use of obligatory exterior shots, including a long montage of scenes of Sam driving his car all over the city, up and down hills, as well as the curvy block of Lombard Street, as so many directors love to portray.