Masters of Sex Involuntary (Season 1, Episode 9)
TV-MA
TV Episode | 56 min | Drama, Romance

Masters of Sex

Involuntary (Season 1, Episode 9)

TV-MA

TV Episode | 56 min | Drama, Romance

Virginia and Dr. Masters move on to filming involuntary reactions during the study, with Jane as usual being the first subject. Ethan reveals information about his heritage that threatens their relationship.

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Cast	+ Add Cast
26 cast members

Name	Known for
Michael Sheen Dr. William Masters Dr. William Masters See fewer	Masters of Sex (2013)
Lizzy Caplan Virginia Johnson Virginia Johnson See fewer	Hot Tub Time Machine (2010)
Caitlin FitzGerald Libby Masters Libby Masters See fewer	The Trial of the Chicago 7 (2020)
Teddy Sears Dr. Austin Langham (credit only) Dr. Austin Langham (credit only) See fewer	The Flash (2014)
Nicholas D'Agosto Dr. Ethan Haas Dr. Ethan Haas See fewer	Trial & Error (2017)
Heléne Yorke Jane Martin Jane Martin See fewer	The Other Two (2019)
Julianne Nicholson Dr. Lillian DePaul Dr. Lillian DePaul See fewer	August: Osage County (2013)
Ann Dowd Estabrooks Masters Estabrooks Masters See fewer	Compliance (2012)
Rose McIver Vivian Scully Vivian Scully See fewer	The Lovely Bones (2009)
Kevin Christy Lester Linden Lester Linden See fewer	Race to Witch Mountain (2009)
Doug McKeon Reverend Peter Mayfair Reverend Peter Mayfair See fewer	On Golden Pond (1981)
Tim Ransom Dr. Rish Dr. Rish See fewer	Star Trek: Deep Space Nine (1993)
Rob Kerkovich Jeremy Jeremy See fewer	The Rebound (2009)
Bennet Guillory Eustace (as Ben Guillory) Eustace (as Ben Guillory) See fewer	The Color Purple (1985)
Claire van der Boom Shirley Shirley See fewer	Red Hill (2010)
Bug Hall Schacter Schacter See fewer	The Little Rascals (1994)
Gil McKinney Charles Charles See fewer	Once Upon a Time (2011)
Kate Fuglei Marie Marie See fewer	The Onion Movie (2008)
Jeff Doucette Mr. Langshaw Mr. Langshaw See fewer	Doctor Dolittle (1998)
Logan Donovan Travis Banks (as Logan Fahey) Travis Banks (as Logan Fahey) See fewer	Pocket Listing (2015)
Adam Silver Tim Deasy Tim Deasy See fewer	Masters of the Air (2024)
Jamie Landau Mason Mason See fewer	X-Men (2000)
Michael Yavnielli Jacob Jacob See fewer	It's Complicated (2009)
Rick Marcus Roger Roger See fewer	Captain America: The First Avenger (2011)
Olivia May Peep Show Woman Peep Show Woman See fewer	Faking It (2014)
Devlin Wilder Affluent Gentleman (uncredited) Affluent Gentleman (uncredited) See fewer	The Man in the Maze (2011)