Blindfold (1965) - I watched this movie for the upcoming 1965 movie list.
Dr. Bartholomew Snow, (Rock Hudson), is a psychiatrist who is asked by government agent General Pratt, (Jack Warden), to treat Arthur Vicenti, (Alejandro Rey), a former patient of his who is now a government scientist who has had a mental breakdown. However the patient is being held in a secret place known only as "Base X", so Dr. Snow has to wear a blindfold whenever he is taken there. The patient's sister Vicky Vicenti, (Claudia Cardinale), thinks that her brother has been kidnapped by Dr. Snow, so she has him arrested. When he is released by the police, she tries to tell the press about her brother, forcing Dr. Snow to kiss her to shut her up, and then tell the press that they are engaged. Later a man named James Fitzpatrick, (Guy Stockwell), shows up claiming to be the real government agent, and telling Dr. Snow that Pratt is actually an enemy agent. Dr. Snow has to figure out who is telling the truth, and who is lying, and try to use clues to figure out where his patient is being held.
This is a fun suspense thriller with some comedy and a little romance thrown in for good measure. The swamp scene is a bit unbelievable, overall this is a very good movie. If Hitchcock had made a comedy film, he might have made something similar to this movie. It's not quite up to Hitchcock's standards, but it feels like it could have been influenced by him.