Other: In the scene where Clint Eastwood (as Walt Coogan) is chasing Don Stroud (as James Ringerman) on their motorcycles up the stairs, a funny slip up occurs. Stroud makes it up OK, and Eastwood follows him, only to ride headlong into the corner of the stone staircase. He is just beginning to fall over when director Don Siegel cuts away to the next scene.

Continuity: When Coogan first meets Julie in the New York police station and puts her coat on for her you can see his cigarette in his hand, then his mouth, then his hand again as the camera angle changes.