Showtime is about to have some major holes in its schedule created by the respective finales of both 'Dexter's seventh season and 'Homeland's sophomore run, and even with the returning Sunday lineup of 'Shameless,' 'House of Lies' and 'Californication' plenty of new dramas are waiting in the wings. Enter 'Masters of Sex' and 'Ray Donovan' putting together an impressive mix of stars that includes Michael Sheen, Lizzay Caplan, Liev Schrieber and even John Voight! Are you ready for a first look at Showtime's new dramas?

Worried about your fix of steamy drama and white-hot action on Showtime after 'Dexter' and 'Homeland' conclude their current seasons?  No longer!  Official premiere dates have yet to be set, but Showtime is ready to answer the call with both upcoming dramas 'Masters of Sex' and 'Ray Donovan,' both of which are on display in a new trailer from the network.

Starring Michael Sheen ('Twilight') and Lizzy Caplan ('Party Down'), ‘Masters of Sex' follows famous real-life 1960s human sexuality research pioneers William Masters and Virginia Johnson following the duo’s unconventional lives moving from a St. Louis teaching hospital to Johnny Carson and the cover of Time Magazine. The series is adapted from Thomas Maier’s book ‘Masters of Sex: The Life and Times of William Masters and Virginia Johnson, The Couple Who Taught America How To Love.’

‘Ray Donovan’ stars Liev Schrieber in his first regular TV role as a contemporary Los Angeles “trouble shooter” and “fixer” working for the city’s elite. The series’ all-star cast includes Jon Voight as the ex-con Donovan clan patriarch and Elliot Gould as Ray’s long-time client and mentor, along with Eddie Marsan and Dash Mihok, who will play Ray’s brothers, and Paula Malcomson (‘The Hunger Games‘) in the role of Ray’s wife.

Check out the trailer for both new series below, and stay tuned for official premiere dates!