When Paul calls Lona in her apartment during the stakeout, it is raining. When he meets her on the roof a few minutes later, it is not raining, and there are stars in the night sky.
Exterior shots of the entrance side of Lona McLane's apartment building show it to be angled, but the map of the building in the stakeout room has all straight sides.
The nurse went to Apartment 423, immediately next door, to ask for ice cubes, Around 1:13, when McAllister is dictating a phone message for Eckstrom, he says the woman who lives in 426 saw a man in 423 when she asked for the ice cubes. It isn't likely that she lives in 426, since she lives on the same side of the hallway, her apartment would have to have an odd number, i.e. 421 or 425. And, sure enough, at around 1:22 the nurse is seen entering her apartment door clearly labeled 421.
When Lt. Eckstrom explains the layout of the apartment building to the detectives, he points to the apartment where the stakeout will take place, then points to a room just below it and tells the detectives to be sure to avoid contact with the other tenants. The room he points to is a bedroom in the stakeout apartment, so no tenants would be in that room.
Early on, Lona McLane phones to find out the time. Later she is shown to have a clock in her apartment.
In that era, it was common for people to call the operator or a special phone number to check the time. This was done to check that the time on one's clocks or watch was correct or simply out of boredom.
In that era, it was common for people to call the operator or a special phone number to check the time. This was done to check that the time on one's clocks or watch was correct or simply out of boredom.
There are too many keys to Wheeler's car, because whoever goes up to it - whether Paddy, or Lona, or Paul - has the ignition key to it even when they haven't been in contact with each other.
Duplicate car keys were very easy to make, but most, if not all, passed the key to the other. Paddy took the key from Paul after Paul killed Wheeler (and first took the key from Wheeler), and then Paul took the key back from Paddy after he (Paul) killed Paddy. Lona didn't have the key, as she drove her own car.
Duplicate car keys were very easy to make, but most, if not all, passed the key to the other. Paddy took the key from Paul after Paul killed Wheeler (and first took the key from Wheeler), and then Paul took the key back from Paddy after he (Paul) killed Paddy. Lona didn't have the key, as she drove her own car.
When the detective meets Ann Stewart (Dorothy Malone) for the first time, she goes up to the 4th floor. However, it's obvious her apartment is on the same floor as Lona McLane's (Kim Novak) (i.e., the 5th floor, as seen in the panning shots).
Actually Lona's apartment (423) is on the 4th floor; this is obvious when Wheeler enters the apartment using his key.
Actually Lona's apartment (423) is on the 4th floor; this is obvious when Wheeler enters the apartment using his key.
When Sheridan looks down from the roof, a line of cars parked along a curb is seen. But the cars are parked bumper to bumper, revealing that none of them were parallel parked (there is no space between them to allow a parallel parking maneuver or to pull out). Instead, it is obvious that each one was driven straight in, one by one, into position and parked behind the preceding one.
As in Double Indemnity (1944), although Fred MacMurray's character is not married, he wears a wedding ring throughout the film.
Police (or anyone) who are surveilling someone, would never do so standing right by the window holding binoculars so as to be observed by anyone outside.