"So Who Says Only Hitchcock Can Make a Mystery Suspense Film?"
Charade has been called (too often, I think) "The Best Hitchcock film Hitchcock never made."
A number of people I've met over the years think that Hitchcock DID make it (that he did not is apparent in its lack of his visual set piece style.)
The reasons are pretty obvious though. Cary Grant. And with Audrey Hepburn as he had been with Ingrid Bergman and Grace Kelly. Hitchcock WANTED to work with Audrey Hepburn, and had her for a 1960 movie called "No Bail for the Judge" until she backed out. (Hitch was furious.)
BUT:
One interviewer asked Stanley Donen, the director of Charade, about its resemblance to a Hitchcock movie.
And Donen responded rather angrily: "So who says that only Hitchcock can make a mystery s uspense film?"
A good point. And in the 1960s and 1970s, suddenly a LOT of people were making Hitchcock films.
Christmas 1963 saw both Charade and The Prize at theaters. The Prize was an informal remake of North by Northwest and by the same screenwriter, with Paul Newman(mugging too much) in the Cary Grant role. Wrote one critic "Imitation Hitchcock seems to be in style this Christmas."
Though Psycho had put Hitchcock on the horror thriller map, it was his spy thriller North by Northwest that was probably more influential in the 60s. Spy movies EVERYWHERE, led by James Bond over seven movies, and
Arabesque
The Ipcress File
The Sillencers
Blindfold
Funeral in Berlin
The Spy Who Came in From the Cold(VERY serious.)
Plus non-spy thrillers like Charade and Wait Until Dark(both with Audrey Hepburn menaced by crooks over a hidden fortune.)
And the very scary Cape Fear, turned down by Hitchcock, but with a Psycho-like score by Bernard Herrmann who wrote that same score.
Poor Hitchcock found himself besotted on all sides by people trying to make thrillers (and money) like he did with NXNW and Psycho. He competed starting strong with The Birds(more horror and a SciFi/fantasy angle) but losing the battle to more sexy, action packed films as all he could offer was the auteurism of Marnie, Torn Curtain, and Topaz.
Back on topic: of ALL of those sixties films above, only Charade really feels like classic Hitchcock in its low key mix of murder, romance, and mayhem. Wait Until Dark is a scream machine(like Psycho) but without romance.
Came the 70s, the spy chase thriller got gruesome with Marathon Man and overtly political with Three Days of the Condor.
And as the decades went by - Hitchcock died in 1980 -- it was like the genteel thriller died with him. Horror, ultra-violence and Bond continued on.