Just from the way the pre-credit sequence is shot, the introduction of Jean-Paul Belmondo and the super soundtrack, it is clear this is going to be fun. There are one or two far fetched elements but who cares, when the entertainment is this good? We are swept along from the very start with a cash pick up we learn about afterwards and before we can be certain a robbery is under way and there are already some half dozen people shot. I chose to watch this in the English dub and it was fine with Belmondo shining through. He is ably supported all round and though there is no female participation things never stop. there is time too for some humour and yes, that soundtrack is spot on. Excellent stuff.

This movie from 1975 is maybe the best Belmondo action thriller. He plays the headhunter Roger Pillard who is hired by the police to catch "the beast", a robber that no one can identify because he kills all witnesses. Then it happens that a robbery goes wrong and a witness survives ...The screenplay is full of ideas with subplots and a lot of surprising twists. The subplots are well integrated in the story and do not disturb the main plot. Bruno Cremer as the beast is perfectly casted as the counter player.Recommended.

To answer to the previous comment: finding a person knowing where he lives is quiet easy. A name on the mail box, any letter or paper in his home will give his identity. Belmondo is in the villain's house alone. OK, they could show us, but we can imagine.What I think is worse in the story is that the "Epervier" would NEVER have let live the young man who helps him in the jewelry robbery. He kills everyone, except this young man, leaving him only injured. It's nonsense, this particular villain could not do that. He was not in such a hurry, he takes time to kill the two cops and doesn't take the time to shoot the kid! And also it's using a very bad facility in the scenario than to just make this young man, the only one the "Epervier" let live knew exactly who he was and where he lived...I think the scenario would have been better if either the story was only between the Alpagueur and the Epervier OR between the Alpagueur and the Prison story. Two stories in the same movie makes one of them writtent quickly. I would have loved to see the Epervier character a little more explained, this was an interesting character that was underused in the movie and lost for another scenario.

A good thriller, with a very good cast and Belmondo at his best. Excellent photography, and everything you may wish, but a very important thing is missing: How did Belmondo identify the criminal? Nothing is explained. He just happens to find him, and we are not part of the secret. It is a pity, for the picture was doing well, and is very entertaining. But the rating of 8 went down to 6 in the two or three last minutes. The French are good at this type of thing, and Belmondo excels. But in this case they committed the unpardonable sin.