 The trilogy of books on which this movie and its predecessors are  based was actually filmed in reverse order. The first movie to be  made, Pan Wolodyjowski (1969) (qv), is based on the final book of  the trilogy, the second movie, Potop (1974) (qv), was the second  book and Ogniem i mieczem (qv), the final movie to be made, is  based on the first book.