Synopsis by Hal Erickson
Republic's Swingin' on a Rainbow utilizes a plotline that had already done service in several of the studio's previous budget musicals. Would-be songwriter Lynn Ford (Jane Frazee) comes to the Big City, demanding $1000 from bandleader Jimmy Rhodes (Richard Davies). It seems that Rhodes has scored a hit with one of Lynn's songs, which he has plagiarized. While hunting Rhodes down, Lynn meets a personable young man named Steve Ames (Brad Taylor) -- who, unbeknownst to her, is the pen-pal lyricist with whom she's been collaborating for the past year. Former comedy great Harry Langdon makes his final film appearance in a Robert Benchley-esque supporting role; Langdon died while rehearsing a song-and-dance number for the film.
plagiarism, revenge, songwriter