This 1979 re-hash of the classic swashbuckling tale is by far the weakest of the lot with not alot to recommend it I'm afraid. Sellers looks tired (and in fact died 18 months later very sadly) and the script is disappointing - even though those tried and true combo of Dick Clement and Ian La Franais worked on it.
For me, being a classic era special visual effects buff from a time when it was all done by hand, the only plus points in this film are the beautiful Albert Whitlock matte paintings that grace the screen numerous times throughout as painted castles, mountains, rivers, palaces, London's Big Ben, moody moonlit windmills - and the excellent blue screen duplication of Sellers in many slapstick sequences..
Worth it for the visual effects, though the dvd transfer is soft, mushy and altogether poor.