Mistresses isn't quite a relationship drama, although it does focus on the romantic--and often illicit--entanglements affecting four female friends. Rather, it's something more akin to a thriller: sleek and seductive with a hint of menace. The first volume of British drama series Mistresses , which encapsulates the series' two season run earlier this year on BBC America, is available today for sale as a four-disc set. It tells the story of four very different women who find themselves dealing with complicated and complex relationships as they juggle the dual specters of career and personal fulfillment. But don't let the title put you off from enjoying this complex and provocative series. Yes, the twelve episodes contain more than a heaping dose of sex and scandal but there's also a perilous throughline that runs beneath the surface, giving Mistresses the feel of a noir thriller that asks questions about coincidence, fate, and manipulation. Brilliant physician Kati