The pool into which Rebecca De Mornay's character is dumped is at the Pleasantdale Chateau in West Orange, NJ - and is the same pool in which 'Wilfred Brimley' and the others frolicked in the movie "Cocoon (1985)"
Mariska was pregnant with her first child during the filming of this episode. You can see that they tried to cover her in many different ways. Carrying files, buttoned up coats, and in one scene, she leans over a body and then pulls her jacket together to cover her belly.