Here is a sample of reviews from the French site, for The Bells Toll At Noon. This is translated to English with Google translate, I have not cleaned up the translation at all.

This episode gets ONE STAR out of four from the reviewer:

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Charlie Hazard (Kevin O'Connor), must reveal important information to McGarrett. Steve gets angry at the man's lack of caution and he is right: he is shot dead by a hitman at noon in front of a church.

Jack Lord is behind the camera to direct this episode. Multiple guest stars Milton Selzer and Don Knight are back.

Father Neil (Mel Ferrer) witnessed the murder. He was waiting for Charlie who had a meeting with him and wanted to talk to him.

Shortly after, Tommy Saito (Jimmy Borges) meets Steve and talks about his murdered sister. The two men listen to the killer with the spectacled rifle, who makes a group of students laugh by telling funny stories. The latter, however, has a voice that is particularly painful to listen to. His name is Johnny Kling (Rich Little) and he makes Steve laugh.

The killer keeps seeing Raoul Walsh's "The Fantastic Twenties" at the cinema over and over again with James Cagney and Humprey Bogart, and tends to think he is Cagney. He goes to James Kellman (Milton Selzer). He brings the man to his knees and shoots him after pretending to be "Mr. Cagney", then phones McGarrett to challenge him.

When Steve goes to the meeting, Johnny Kling asks McGarrett to turn on an old phonograph which plays music from "Fantastic 20s", and to open a door: Kellman, mummified, falls stiffly in front of a stunned Steve who feels like a real old thriller.

On a beach, our cracked killer kidnaps Bob Thayler (Don Knight), while Steve, through a sketch drawn by a female witness after Kellman's murder, identifies Johnny Kling as the assassin. With Danny, he goes to his house and finds that his apartment is a real museum dedicated to James Cagney. A little earlier, Kling visited Tommy's sister's grave. The latter swears to Mc Garrett that the man did not know his sister.

Family reunion of all the guests of Hawaii State Police: the projectionist at the cinema is played by Kwan Hi Lim!

Meanwhile, pretending to be James Cagney in "The Public Enemy" (1931), the madman reconstructs the story by threatening Thayler alongside huge vats of gasoline. Steve gets his surrender. But during the arrest, Kling begins to perform a dance move.

This episode deeply disturbed me. Jack Lord wanted to pay homage to the Hollywood cinema of the golden age, but Rich Little plays like a pig. He histrionics and is not for a moment credible. We note that every time the series wants to think outside the box, it's a disaster. Here, the suspense does not take a single minute as Iry Pearlberg's scenario is grotesque. We could compare this opus to the one where the Five O team only arrived after twenty minutes, "Who is the target? (08.05) where a young actress invaded the screen in front of the astounded viewer. Or the episode with Leslie Nielsen in the wild west, 07-07 "Sense of justice". We feel sorry for Jack Lord who wanted to be "original" and create a story that was out of the ordinary, but in the end , it's a total flop. Too anchored in its reality as a detective series, the Hawaii five O saga cannot tolerate atypical episodes.