A drama series that has received critical acclaim and has become a linchpin of the pay-cable channel’s programming lineup will premiere its fourth season on Sunday, Sept. 11. The series is “Masters of Sex,” which stars Michael Sheen and Lizzy Caplan as real-world sexuality researchers William Masters and Virginia Johnson.

“Season four begins in 1968 and will take viewers into the ‘swinging ’70s,’ during which time the series’ characters will take on new partners … professionally, personally and sexually,” Showtime said in today’s announcement. “As the late ’60s become the early ’70s, ‘Masters of Sex’ is all about revolution. Bras are burning, sex is everywhere, and Masters and Johnson reap the benefits and the pressures of the revolution they’ve let loose in the world.”

The series also stars Caitlin FitzGerald and Annaleigh Ashford, with a guest lineup that includes Beau Bridges, Sarah Silverman, Niecy Nash, Betty Gilpin, Andre Royo, David Walton, Alysia Reiner, Jeremy Strong and Ashley Zukerman.

“Masters of Sex” was developed for television by Michelle Ashford (“The Pacific”), who also serves as an executive producer. In addition, the series is executive produced by Sarah Timberman, Carl Beverly, Amy Lippman and Judith Verno. Michael Sheen, Lizzy Caplan, Tammy Rosen and Thomas Maier serve as producers.

Here’s a teaser for season four: