The actor will guest-star in two episodes of Showtime's sexy period drama, in which he'll play opposite Allison Janney in her Emmy-winning role.
Donovan will play Graham, a scientist whose relationship with Margaret Scully (Janney) brings them to Masters and Johnson's clinic. Relationship? Perhaps Margaret has finally found someone else to give her joy in the bedroom. Donovan joins The Good Wife's Josh Charles and Maggie Grace, who have also signed on for the series' third season.
Masters of Sex premieres July 12 at 10/9c on Showtime.
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