Showtime's debuting two new scripted shows this year -- the Liev Schreiber series "Ray Donovan." premiering on June 30th, and the period drama "Masters of Sex," starring Lizzy Caplan and Michael Sheen as Virginia Johnson and William Masters, pioneers of research into human sexual response. With racy subject matter, a "Mad Men"-esque historical gleam and a quirky, talented pair of leads, "Masters of Sex" is bound to be a little easier to push than the more complicated "Ray Donovan," as the first teaser below suggests. "Masters of Sex" kicks off on September 29.