Although Carol Reed had an outstanding record of working with young actors, he found Bobby Henrey's short attention span very difficult to cope with. Many of his scenes were played with the young man looking at his favorite grip or electrician, and his performance was pieced together in the cutting room.
Baines' comment about tea being "The Cup that cheers" is based on the old temperance slogan promoting tea drinking, "The cup that cheers but does not inebriate".
Despite his character's hatred of Mrs. Baines, Bobby Henrey's favorite person on set was the actress who played her, Sonia Dresdel.
Madeleine Gal Henrey, mother of Bobby Henrey, appears briefly at the very end of the film as Phillipe's mother.