The first series of the TV drama based on the lives of William Masters and Virginia Johnson, who conducted pioneering research into the nature of human sexual attraction.

Dr William Masters (Michael Sheen) is a leading US obstetrician determined to launch a study of human sexual behaviour. When he makes the acquaintance of Virginia Johnson (Lizzy Caplan), Masters finds an assistant who possesses the qualities to help him move forward with his plan.

Though in many ways Masters and Johnson are polar opposites, as their project progresses a growing sense of attraction develops between the two and the line begins to blur between their personal and professional interests.

The effect an Involved Man can have on the world is profoundly good. When a man is truly involved in the relationships that matter most, everyone benefits. However, for too long, men have been led to believe that being a man and being masculine is defined by their conquests at other's expense, or, that men are simply inherently worse these days. In The Involved Man, Michael Ashford offers up a way for men to structure their lives and how they think about their place in the world - the good they can bring and the joys they can experience by placing others needs above their own selfish desires. In living a life prioritized by Purpose, People, Passions, and Profession, men can repair how they're seen in society and in their relationships.