The working title of this film was Come In, Children. Before the opening credits roll, a toy tank dissolves into a life-size version, after which it attack a car, then smashes it under its tires. "Timmy," a little boy, then walks out of the wreckage, picks up the tank, which has returned to its toy-size, and is greeted by a group of children. When the little girl in the group holds out her hand to Timmy, an aura surrounds her image, after which the film's title and credits appear. The first eight-and-a-half minutes of the film contains no dialogue.
       Although Hollywood Reporter production charts noted that the film's color process was Colorvision, onscreen credits list the color process as Technicolor. A Hollywood Reporter production chart places Tom Hunter in the cast, but his appearance in the released film has not been confirmed. Filmfacts noted that some location filming was done in Hillsboro, NM.
       According to publicity material contained in the film's production file at the AMPAS Library, "LQJAF" is an acronym for L. Q. Jones and Friends. The title "Nepotist" listed in the onscreen credits refer to Barry Moore, the son of producer Alvy Moore, and Randy McQueen, the son of producer-star L.Q. Jones, who, according to studio publicity, both worked on the film's crew. Several other relatives of the crew also worked on the film: Moore's daughter Alyson and mother Elsie appeared as a little girl and one of the witches, respectively. Director Bernard McEveety's children Shelia, Kevin and Brian appeared as three of the children. The Brotherhood of Satan marked the motion picture debut of Geri Reischl.