Although the original British submission was uncut and rated 12A, it was replaced by a cut PG version removing 6 seconds of violence/injury.
The Australian release was censored; after the film initially received an M rating from the classification board the distributor (Paramount) decided to re-edit the film in order to obtain a more lucrative PG rating. Following some changes made to the film a modified version of the film was submitted to the board, however this modified version was still seen as being too strong originally and received the original M rating given to the film, however following an appeal from Paramount the film was lowered to PG on December 11th with the consumer advice now stating that the film contains "Mild science fiction violence and mild themes. Some scenes may scare young children". Both versions were approved for theatrical release.