The unidentified two-strip Technicolor sequences used to illustrate "The Ziegfeld Follies" were lifted out of Glorifying the American Girl (1929). The star of this film, also unidentified although frequently shown in the clips, was 'Mary Eaton', sister of interviewee Doris Eaton.
The episode titles are named after Broadway songs. "Give my regards to Broadway" is from Le jockey favori (1923), "Syncopated City" is from Divorce en musique (1941), "I got plenty o' nuttin" is from Porgy and Bess (1959), "Oh, what a wonderful mornin'" is from Oklahoma! (1955), "Tradition" is from Un violon sur le toit (1971) and "Putting it together" is from Sunday in the Park with George (2013).