Goofs

When Edmond O'Brien is getting ready to watch a movie on TV, he pours himself a glass of beer which is almost entirely foam. When he stands up to turn off the TV, the glass is suddenly full of beer.

Owen Clark goes out of his way to "accidentally" stumble upon Elizabeth's lost shoe, giving him a clue that she had been in the shack.

Toward the end of the film, two police officers chase after Raymond Burr and Natalie Wood. Both officers race together until they get to a flight of stairs, then one officer continues while the other stops inexplicably. The officer racing up the stairs is shot, and a second later and then falls down the stairs (thus providing an explanation as to why the second officer stopped the chase, so he wouldn't be hit as the actor portraying the officer who was shot rolled down the stairs). In reality, both officers would have continued their pursuit.

In addition, police chasing a known armed suspect (the gun thug had already fired one round) would have their guns out at the ready. Once the gun thug appeared at the top of the stairs sans the hostage, they would have opened fire.