Continuity mistake: During the informal interview with the singing neighbour, the position of her hand with the brush changes between cuts, and when the inspector tries to bluff saying he has business with the suspect, she has an empty hand, but after the cut she is holding the powder box. (00:38:05)
Continuity mistake: In the flashback showing her possible true death, Rosa starts drinking from a glass that is almost full, but not quite. At the first cut, the glass refills itself and she is holding it closer to the base. (01:08:20)
Continuity mistake: Eli Wallach dismisses the ex cop and the ex hitman and taps on the table to call attention from his clients. Cut, and he's suddenly holding the walking cane by the handle, instead than mid-length. (00:59:45)
Continuity mistake: Corinne Clery is kissing the inspector, straddling his lap while they discuss exotic locations and feral contraband. She has his hands behind his neck, fastened, but at the cut they are apart and only then she brings them together again. (00:57:10)
Continuity mistake: After making love with Corinne Clery, the protagonist asks her when did the prostitute at the party die. The date mentioned is November the 30th, and he says "It's today", but the politician's obituary was dated November 18th. (00:48:00)
Continuity mistake: Eli Walach pushes with his cane the cigarette packet closer to the Inspector; in close-up the packet starts off much further from Lomenzo than its original position. (00:17:25)
Continuity mistake: Inspector Gaspare Lomenzo arrives home and bickers with his girlfriend. After telling her that he's her "white slave", he leans against the counter; his hand is on the corner in the wider angle, on the front in the close-up. (00:09:20)