Alan Hale, Jr. plays Porthos, the same musketeer played by his father Alan Hale in The Man in the Iron Mask (1939), of which this movie is a direct remake, the earlier movie's screenplay is credited along with the Dumas novel as source material. Furthermore, in At Sword's Point (1952), a Hollywood-concocted sequel to Dumas' novel "The Three Musketeers", Hale played the son of Porthos, while this movie's D'Artagnan, Cornel Wilde, had the role of D'Artagnan's son.
Cornel Wilde, veteran fencer and actor in this movie, commented on the action scenes and noted: "Actually, they represent some of the most exciting scenes in which I have ever appeared."
The movie marked Alan Hale, Jr.'s third and final portrayal of Porthos in a movie after inheriting the role from his father, Alan Hale, who had originated the merry character in The Man in the Iron Mask (1939). Hale, Jr. played Porthos, Jr. in At Sword's Point (1952), and then portrayed Porthos for the second time in Lady in the Iron Mask (1952).
In an effort to realistically capture the opulence and grandeur of eighteenth century French court life, producers Heinz Lazek and Ted Richmond were fortunate to gain access to many of the most picturesque castles, palaces, and verdent forests in and around Vienna, Austria, where the entire production was filmed.
D'Artagnan was portrayed by Cornel Wilde in this movie and was the latest of many screen appearances for one of the most popular heroes of all time. First, beginning in 1915, D'Artagnan was portrayed in several early Biograph one and two-reelers. D'Artagnan made a major screen debut in the first lavish version of The Three Musketeers (1921) with Douglas Fairbanks in the role. Fairbanks also returned to the part in the initial screen version of The Man in the Iron Mask (1928). Walter Abel portrayed the first D'Artagnan in a movie with sound in The Three Musketeers (1935), and a short time afterward, Don Ameche had filled the adventurer's boots in the book's second re-adaptation, The Three Musketeers (1939), a movie that featured The Ritz Brothers. The production notes for this movie stated: "But Cornel Wilde probably brings the greatest authority to the character as a skillful fencer, who, at an early age, won National Fencing Championship titles and even landed himself a position on the U.S. Olympic Games Fencing Team,"