That William Shatner and Spader do work off eachother well....I never saw that episode but my brother called me busting a gut about it.

I really like Spader in the original Stargate movie as Daniel....a real cutie!

Dead Ringers was a novel too that was made into a movie starring Jeremy Irons as twins, both are gynos who both are involved with the same woman unknown to her. In the book the brothers are incestuous but it only touches on this in the movie. The movie was good but the book was better.......as per the norm.