Early in the episode, we see Tom with keys in the locks on the double locked door. At the end of the episode, the locks appear to be open but the locks are turned around. Mariel and Russell just walk by the room.
Rose puts a shopping bag on the table and the camera pans to newspaper article about three sorority sisters drowning and a fourth is being sought in the investigation.
(Dave & Russell reveal the skeleton)Mariel: What is that?
Russell: You're husband.
Dave: His head is under my bed. Didn't think you wanted to see that.