Ron Kelland’s review published on Letterboxd :
Seriously, with a title like this how can one not watch this film? The Man Who Killed Hitler and Then the Bigfoot (or TMWKHATTB for short) is a bizarre and melancholy film. To summarize the bizarre, Calvin Barr (Sam Elliot and his moustache), a retied WWII special ops soldier assassinated Hitler is living out his retirement alone in Small Town, Middle America. He is approached by the US and Canadian governments to track down and kill The Bigfoot, because, you see, Bigfoot is infected with a plague that will wipe out humanity and due to his special-ops tracking skills and fortuitous natural immunity to the plague means that Calvin is the only one who can go on a last-ditch effort to kill the creature before the Prime Minister of Canada allows the United States to drop like a million tonnes of nuclear bombs on a large tract of Canadian wilderness to get the creature. Yep, that's the plot in a nutshell. As for the melancholy, Calvin is tortured by memories of his war-time service and his lost love, who he was not able to propose to before he shipped out.
TMWKHATTB is a confused movie that does not seem to know if it wants to be a commentary on he psychological and emotional effects of war and aging or if it wants to be a weird and wonderful foray into the wild world of crypto-zoology. Either would have been fine, but it fails to deliver on both, although the ponderous writing and ultra-dramatic score do their very best to keep up the ploy. The film is beautifully filmed and Sam Elliot (and his moustache) is in fine form doing his thing, but it is just not enough to carry the film to its desired destination. Not a bad film, but not a great one either.