First Look: Sarah Silverman on Masters of Sex

After waiting all season for Sarah Silverman to make her debut on Masters of Sex, the actress will finally appear in the fifth episode of the Showtime series.

In the teaser for the upcoming episode, fans get their first glimpse of Silverman as Helen, Betty's (Annaleigh Ashford) offscreen lover. (In the first season, it was revealed that Betty was a lesbian but chose to part ways from Helen in order to be with a man that promised her a world of fulfillment not accessible to a lesbian in the 1950s.) Helen's return promises to shake things up for Betty's "perfect" life.

"I know I can say that she has so many secrets at the top of the season that she's hiding from her husband, played beautifully by Greg Grunberg," Ashford told AfterEllen during a set visit. "Really in the first half of the season she's really navigating all those secrets and keeping them hidden. One of the secrets she has is her relationship with Helen."

Because the show is all about sex, fans can expect to see Silverman in bed.

"Sarah Silverman and I do have a love scene and she was luxurious as a scene partner in that way as well. We laughed a lot and giggled," Ashford said. "We sang the entire 'If Mama Was Married' from Gypsy and the whole crew was laughing so hard. So we had a great time and oh, she was just such a dream to work with. She's one of the most gifted comediennes of our generation and oftentimes we forget that great comedians are great because they're honest and that makes them honest, interesting actors and she brought all of that comedy and humanity to the role that she played and I couldn't be more grateful to have a fabulous scene partner. She's beautiful as an actress and then she was incredible as a human. We had such a ball on set."

Watch a preview of Silverman's debut below: