It seems best to consider Richard Lester's lovely "Robin and Marian" Audrey Hepburn's swansong."Bloodline " is the most distressingly mediocre movie she ever made.
Terence Young had already directed the actress in the excellent thriller "wait until dark" ,a film which compares favorably with Hitchcock's "rear window" .So it was only natural that they teamed up again .
The screenplay is a mess,a disaster ,and it's more complicated than complex.Full of plot holes,of implausibilities (the fabulously rich heiress ,after several murder attempts does not even think of hiring a bodyguard!),and see how Young even copies himself for the last sequence where Hepburn is alone in the house ,of course in the dark,like in the 1967 highly superior effort.
An absurd international cast gives the coup de grâce to the movie: Americans (Ben Gazzara),English (James Mason),Germans (Romy Schneider,Gert Froebe),French (Maurice Ronet) ,Greeks (Irene Pappas),Egyptians (Omar Sharif).All are given lousy parts .They are supposed to be the suspects of a whodunit.