Castor pursues the Leda clones for original tissue samples.Helena, who is pregnant and imprisoned, is examined by amysterious new villain. The Castor boys are also out to play,toying with a frightened young woman, Patty, in a sexyswitcheroo that ultimately sets Sarah - and Art - hot on theCastor trail. But it's not all fun and games for the Castorboys, as Sarah gleans they may have a mysterious defect thatputs their lives in peril.