Dont miss the premiere of Season 4 of Masters of Sex. Starring Michael Sheen, Lizzy Caplan and Caitlin Fitzgerald. Subscribe to the Masters of Sex channel for .\r<br>\r<br>Masters of Sex stars Lizzy Caplan & Michael Sheen tease season 4 of the Showtime TV show and talk about how they might find their way back together.\r<br>\r<br>Watch the official Masters of Sex Season 4 Trailer: Dont miss the premiere of Season 4 of Masters of Sex, starting Sunday September 11th .\r<br>\r<br>The cast of Masters of Sex - Michael Sheen, Lizzy Caplan, Caitlin Fitzgerald, and Annaleigh Ashford - talks about whats in store for them in Season 4. Subscribe .\r<br>\r<br>
