Sarah Butler has two nude scenes in The Stranger Within. She first shows her breasts lifting her shirt up at the mirror while in the bathroom with Estella Warren. The second scene is the one briefly shown in the trailer. She shows breasts a couple of times as she undresses on the beach and then her butt is shown as she runs into the water. There are a couple more butt shots as she is wading in the water.
Warren has a sex scene but does not show anything except a little side boob. The Stranger Within comes out on DVD this Tuesday.