Lizzy Caplan and Michael Sheen Steam Up the Small Screen in New ‘Masters of Sex’ Trailer (Video)

The second season of the Showtime series begins Sunday, July 13

Draw the shades and dim the lights because a new season of “Masters of Sex” is nearly here.

The first official trailer for the steamy Showtime series’ second season was released Friday and it's fair to say show runners are turning up the heat.

“Sex: enjoy it if and when you can,” declares Lizzy Caplan‘s character Virginia Johnson, over vaguely erotic shots of bedrooms and uncovered flesh. “It's a biological function, but keep your heart out of it.”

Also read: Lizzy Caplan's ‘Sex’ Education: ‘I Thought There Would Be Backlash About the Nudity’

Her co-star Michael Sheen, who plays the titular character William Masters, might not be taking her advice. At one point in the above trailer he checks into a hotel with Caplan while pretending she's his wife.

See video: Showtime's ‘Penny Dreadful’ Trailer Is a Real Scream

Showtime's, ahem, penetrating, drama chronicles the real life struggles and sexual interludes of Masters and Johnson, two pioneers in the sex research field.

As TheWrap previously reported, Christian Borle (“Smash”) and Sarah Silverman (“Wreck-It Ralph”) have both been cast for the upcoming season. Unfortunately the trailer doesn't give us any glimpse of their characters.

The second season of “Masters of Sex” premieres at 10 p.m. on Sunday, July 13.