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Supernatural” alum Rob Benedict has joined Showtime’s “Masters of Sex” in a recurring role for season three, Variety has learned exclusively.

Benedict (who moderated “Supernatural’s” recent Comic-Con panel with fellow fan favorite Richard Speight Jr.) will appear in a multi-episode arc as Jonathan Lerner, the new office ultrasound technician working alongside Barton Scully (Beau Bridges) at the Masters and Johnson clinic.

The role reunites Benedict with Lizzy Caplan, who starred alongside Benedict in his superhero short film “The Sidekick,” which received a digital release on iTunes, Amazon and VOD earlier this year. The short, written by Benedict and directed by Michael J. Weithorn (“The King of Queens”), made its world premiere at Comic-Con in 2013.

Benedict and Speight are also collaborating on single-camera comedy “The Kings of Con,” which was funded through an Indiegogo campaign, raising almost three times the project’s initial $100,000 goal. The show is based on Benedict and Speight’s real-life experiences on the fan convention circuit, filtered through a comedic lens. Described as “Broad City” meets “Party Down” with the comedic honesty of “Curb Your Enthusiasm,” Benedict and Speight play caricatures of themselves cavorting through the con world.

Benedict is repped by SMS Agency and Think Tank Management.

“Masters of Sex” season three currently airs Sundays at 10 p.m. on Showtime.