Goofs

Starting at 32:19, the character Walter Richey takes out his glasses to review an exhibit. When he first puts the glasses up to his face, the left 'temple' of the glasses is still folded in. As the camera angle changes, the folded 'temple' is suddenly unfolded.

In the opening scene, the "ghost" approaches the car with the two lovers, and she's not wearing a raincoat. Moments later, she's running toward a staircase and she's wearing a raincoat. And much later, Paul Drake asks the woman's roommate about that raincoat.

Olga Jordan, Paul and Della go to Eleanor's hospital room. The bedside table has a water container, glass and some pill bottles. When they do a close up to Eleanor, there's a robe on the table. The next shot has the robe missing and then in the next close up the robe is on the table again.

Paul wrote a note for Suzanne Granger and handed it to the desk clerk at her apartment building. But he didn't seal the envelope containing the note, and thus the clerk could read it, even though Paul had told the clerk that the reason for seeing Suzanne was private.

UPDATE: As Drake walks back to the desk clerk, Drake can clearly be seen licking the envelope to seal it. He then hands it to the desk clerk to be delivered to Suzanne Granger.

In the opening shot, the ripples on the pond are not moving, revealing that it's a still image.

When Paul Drake is in Room 208, he walks to the other side of the room and stands in front of the outside French Doors. Looking at the outside Room 208 is actually on the ground floor, not the second floor.

The doors opens without Perry turning the knob.

Perry turns the key to the right when "unlocking" the door. Standard door locks would lock when turning the key to the right and unlock when the key to the left.

When Perry turns the door knob at Room 20, the door frame has no mortise behind the strike plate -- it's just solid wood.