Hmm. You must've seen _The Golden Spiders_, then. The guy playing Saul in the series is Conrad Dunn, who was seen very very briefly in _Chicago_ as the doctor who, ahem, examines Roxy. He's shorter, darker, and more foxy-looking than Saul Rubinek (white guy in suit, left side of this picture).

Personally I think the series Saul is too good-looking, not non-descript enough; but he's also much too smirky and smug. He just rubs me the wrong way.