Since this film is based on the 1964 novel of the same name, written by Patricia Highsmith (The Talented Mr. Ripley and many more that have been adapted to the screen), one has to begin with an awareness that there can only be so many twists and turns without straying too far from the source material, which would betray the point of adapting this book to film. So, do take into consideration that this film is a slow burn, more psychological than thriller.
How does this film stack up to other screen adaptations of Highsmith's work? Pretty solid, I'd say. Considering films rarely, in my opinion, are able to convey the same depth of complexity as written material, this film is very capable and allows the actors to use their expressions and body language to convey complex emotions, while the dialogue is used to drive the plot, and it really works.
The ethnically ambiguous Oscar Isaac was a terrific casting choice for the role of Rydal as he is highly believable as a man who can slip into different languages and cultures and make himself at home wherever he lands, while his inner angst makes him unable to find a home within himself. Viggo Mortenson is Viggo, not much else to say, he's always great, though I believe there are other actors who would have been able to play Chester; but we want Viggo to be the "good guy" and it is always compelling to see an actor play against type and play someone who's flawed and not a hero, nor an anti-hero, but just very human and broken. I'm not a Kirsten Dunst fan and normally I would refuse to watch a film she's in, but she actually is fantastic as the young wife, Collette, and struck the right balance of - what did she know about her husband's elicit business affairs and where was she complicit? and where was she totally in the dark? And how much did she truly understand and acknowledge her husband's character flaws (alcoholic schemer) and was she, throughout the film, perhaps using Rydal to get a rise out of her husband because she knew all of his weaknesses and how to get into his head? But there is conflict here as well - does she love Chester, or is she purely in the marriage for the money, and does Chester love her either, or is she merely a possession to him?
I won't bother with any synopsis of the film. Love triangle, yes, but the more compelling piece of the plot is the unresolved lingering father/son issues. It is noted several times within this film that Chester reminds Rydal of his father, and discussions of both men's relationships with their own fathers surface and bind these two men by an invisible thread. Themes of father son, parent/child resentment and parental abandonment are woven throughout the story, as complex as the real-life mother/daughter issues Highsmith had with her own mother.
Both male characters, Chester and Rydal, mirror one another, and their game of cat and mouse is delightful. What does one do when he sees himself in his nemesis? when he can guess every move his opponent will make because these are the same moves he himself would make, but this is no advantage because his opponent can play the same calculated game of mental chess and knows exactly what he will do as well. When you fear your enemy, but love your enemy, not because your enemy is your friend, but because your enemy is a reflection of yourself, and so you in turn loathe your enemy, but you cannot outwit him because you cannot escape nor outwit yourself.
If nothing else, the lush scenery and location, location, location! of this film make it worth the watch. Not without irony, the story begins in Greece and ends in Turkey, two nations which have a complex history with one another, the pull of two faces - Christianity and Islam. After this past year of COVID isolation, traveling from the sofa is better than no travel at all, and the magnificent ruins and sites allow one to feel like a tourist, as the film was shot on location in both countries, adding to its authenticity.
All in all, I rate this film 4 stars due to compelling characters, quality acting, a capable adaptation of a complex story, and excellent cinematography. I would not watch it again, but it is definitely worth watching once, enjoying, and moving on to other films.