On April 9, the FX network will premiere Fosse/Verdon, a new miniseries chronicling the tumultuous romantic and creative relationship and marriage of director-choreographer Bob Fosse and superstar dancer-actress Gwen Verdon (encompassing such classic musicals as Damn Yankees, Chicago, and Sweet Charity). Before that, the U.K.'s Stage Door label is celebrating the late, great Verdon with a new anthology, many of the tracks on which resulted from her partnership with Fosse. Spotlight on Gwen