With a new Planet of the Apes movie, Rise of the Planet of the Apes, out this weekend, it’s time to go back to the movie that inspired it: Conquest of the Planet of the Apes, the fourth film in the Apes film series that was first released in 1972 and became a smash hit despite the fact that it had a darker tone and more violence than any of the Apes films at the time. Before the film was released its ending had to be changed significantly at the behest of test audiences and understandably nervous studio executives. The original ending saw the light of day when Conquest and the other films in the Apes series were released on Blu-Ray in 2008.

You can watch the original ending for Conquest of the Planet of the Apes below this article by clicking on the screen capture I’ve included at the bottom.