I never thought this would go the distance.
In the early seventies, producers Alexander and Ilya Salkind successfully translated Alexandre Dumas’ The Three Musketeers into a pair of films, shot together as one. Despite being sued by several of the performers demanding payment for two films instead of just one, the Salkinds must have thought it was successful enough to attempt repeating the experiment when they adapted Superman for the big screen later that decade.
