Shirley is torn when her law school sweetheart comes back into her life as opposing council, bringing back old feelings and alienating Carl. Meanwhile, Alan and Denny flirt with the idea of swinging when they both have anonymous sexual encounters in the office, and Katie is threatened by Leigh who is jealous of her relationship with Jerry.
Elenco: James Spader , William Shatner , Candice Bergen , John Larroquette , Tara Summers , Christian Clemenson , Gary Anthony Williams , John Larroquette , Julie Bowen , Lake Bell , Mark Valley , Monica Potter , Rene Auberjonois , Rhona Mitra , Saffron Burrows , Tamara Feldman , Tara Summers , Taraji Henson , Taraji P. Henson .