Revealing mistake: Near the end of the film when the wife is running a bath, Michael Douglas is down stairs making tea. As he walks in and out of the living room, in the background there is a curtain that is drawn open but there is no window.
Revealing mistake: In the final confrontation scene Glenn Close comes out of the bath tub and raises her arm, the scene cuts to the gun and when it returns to Glenn Close you can see the fabric of her dress has changed to a thicker one to accommodate and cover the squib needed for her gunshot wound. (01:54:05)????