- Country: Italy
- Genres: Comedy, Sci-Fi, Thriller
- Release: 1967-08-13
- Director: Alberto Lattuada
- Writers: Ermanno Donati , Piero Regnoli , Jack Pulman , Luigi Malerba
- Language: English | Italian
- Stars: Patrick O’Neal , Ira von Fürstenberg , Donald Pleasence , Henry Silva , Nicoletta Machiavelli , Howard St. John , Sorrell Booke , Tiziano Cortini , Elisabetta Wu , Giulio Donnini
- Runtime: 104 min
- Awards: N/A
- AKA: Lyömätön (Finland) , Páratlan (Hungary) , マッチレス 殺人戦列 (Japan) , Αραμπέλα, το γυμνό δόλωμα των κατασκόπων (Greece) , Osynlig spion (Sweden) , Mission Top Secret (United States of America) , Sin rival (Spain) , Matchless (United Kingdom) , El incomparable (Mexico) , O Incomparável Espião (Brazil) , Mission T.S. (France, French Republic) , Mucize Yaratan Yüzük (Turkey) , Den usynlige agent (Denmark) , Matchless (India) , Nenadmasni , Mission top secret (Canada) , Matchless (Italy) , Arabella, to gymno doloma ton kataskopon (Greece) , Matchless , Matchiresu satsujin senretsu (Japan) , Incomparable (Argentina)
- Plot: A secret agent possesses a ring that makes him invisible for a short time, once every 10 hours. He is in pursuit of an evil criminal mastermind but, at the same time, must evade an enemy agent who also wants the ring.
- IMDB:tt0060676
Matchless Cast · · · ALL
Alberto Lattuada
Director
Patrick O’Neal
Perry 'Matchless' Liston
Ira von Fürstenberg
Arabella
Donald Pleasence
Gregori Andreanu
Henry Silva
Hank Norris
Nicoletta Machiavelli
Tipsy
Howard St. John
General Shapiro
Sorrell Booke
Colonel Coolpepper
Tiziano Cortini
Hogdon (as Lewis Jordan)
Elisabetta Wu
O-Lan (as Elisabeth Wu)
Eddra Gale