- Actor Allusion: In 1961 film adaptation, Martha tells Karen: "We're always in style. But you're not. You're Fifth Avenue. Rue de la Paix." Audrey Hepburn had indeed been filmed on Rue de la Paix in Paris and on Fifth Avenue in New York.
- Adaptational Context Change:
- The plot of These Three is censored due to The Hays Code. In the original play the accusation is Martha and Karen are a couple, and Karen is cheating on her fiancee. In the 1936 version it's assumed Martha and Joe are cheating. Thus many of Joe's lines are given to Karen, and his anxiety over the concept of his girlfriend cheating on him is transferred to her. The climax and ending are completely different. Instead of Joe leaving Karen it is Karen who didn't believe Joe. The dialogue afterwards between Karen and Martha is considerably less dramatic as Martha is calmly confessing her unrequited feelings for Joe instead of giving a gayngst filled Anguished Declaration of Love to Karen. The ending is a Bittersweet Ending where Karen and Joe reunite but the reputation of their school remains ruined instead of the Downer Ending of the play where Martha killed herself and Karen and Joe stay separated.
- The Childrens Hour film changed Mary's grandmother apologizing to Karen to happen before Martha's death
- Deleted Scene: Judging from promotional screenshots for the 1961 film, the scene where Martha and Karen try to sue Amelia for libel was originally on-screen and was shot. However, the scene was not in the final product and has never surfaced.
- The Hays Code: William Wyler cut several scenes hinting at Martha's homosexuality for fear of not receiving the seal of approval from the Motion Picture Production Code. At the time, any story about homosexuality was forbidden by the production code.
- What Could Have Been: There are promotional images of the court scene in the second film adaptation. The final film doesn't show the scene.
Trivia / The Children's Hour