The producer chose to change the ending, and both Curtis Harrington and Piper Laurie refused to be involved in the re-shoot. It was allegedly shot by Stephanie Rothman, who has neither confirmed nor denied her involvement. This ending, featured in the TV commercials at the time of the theatrical release, helped make it the box office success it was.
The version broadcast on television contained a lot of footage not seen in the theatrical version. The footage was allegedly shot by Stephanie Rothman, new for the TV sale, not scenes deleted from the original version. This version was also available on VHS tape. The DVD release is the theatrical version.