Masters of Sex is an American period drama television series that premiered on September 29, 2013, on Showtime.
 It was developed by Michelle Ashford and loosely based on Thomas Maier's biography "Masters of Sex".
 Set in the 1950s through the early 1970s, the series tells the story of Masters and Johnson (Dr. William Masters and Virginia Johnson) who are portrayed by Michael Sheen and Lizzy Caplan.
 The series has received critical acclaim.
 It was nominated for a Golden Globe Award for Best Drama Series in 2013.
 The series was canceled by Showtime on November 30, 2016, after four seasons.
This is a list of episodes for "Perry Mason", an American legal drama series that aired on CBS television for nine seasons (September 21, 1957 – May 22, 1966).
 The title character, portrayed by Raymond Burr, is a fictional Los Angeles criminal defense lawyer who originally appeared in detective fiction by Erle Stanley Gardner.
 Many episodes are based on novels and short stories written by Gardner, with some stories having been adapted more than once.
Age of Glory () is a Chinese drama series which co-produce by Double Vision and ntv7.
 It was telecast on every Monday to Thursday, at 9.45 pm on Malaysia's ntv7 channel.
 This period drama was set in the early years of the independence of Malaysia.
 The cast in this series are renowned artists such as Debbie Goh who was based on TVB in Hong Kong, together with ntv7's reporters, Danielle Dai and Aenie Wong.
 Also, guest appearance by Janet Khoo.
 This is the first time director James Lee leads Chinese drama series and a period drama genre.
 It was the highest rated drama series in 2008.
Vegas is an American period drama television series that ran on CBS from September 25, 2012 to May 10, 2013.
 The series starred Dennis Quaid and Michael Chiklis.
 The series was co-created by Las Vegas chronicler and "Casino" screenwriter Nicholas Pileggi, who also wrote the pilot.
Andrew Render Stahl (born April 8, 1952) is an American actor who has been acting for over 20 years.
 Two of his more memorable roles were Tom McHone in the "Christy" series and General Armand Stassi in "seaQuest 2032".
Jonah is an Australian television drama series which aired for 20 episodes starting from 15 October 1962 on the Seven Network.
 Produced during an era when commercial television in Australia produced few dramatic series, "Jonah" was a period drama, and was inspired by the success of ABC's period drama mini-series like "Stormy Petrel".
 The episodes still exist
"" (stylized as "TURИ: Washington's Spies") is an American period drama television series developed by Craig Silverstein and based on Alexander Rose’s book "" (2007), a history of the Culper Ring.
 The series aired on AMC from April 6, 2014, through August 12, 2017.
 During the course of the series, episodes of "Turn: Washington's Spies " aired.
Christy is an American period drama series which aired on CBS from April 1994 to August 1995, for twenty episodes.
Steven DePaul is an American television director and producer.
 He has directed multiple episodes of Shades of Blue, NCIS-LA, CSI-NY, GRIMM, The Unit, Bones, as well as many episodes of one-hour dramatic television (updated list IMDB).
 He was a longstanding producer and director on "NYPD Blue".
 In his capacity as producer of "NYPD Blue" he won the Emmy Award for Outstanding Drama Series in 1995 and the Golden Globe Award for Best Television Series – Drama in 1993.
 He was also nominated for this award for his work on "NYPD Blue" on five other occasions (in 1994, 1996, 1997, 1998 and 1999).
 He won a George F. Peabody for "Raging Bulls" (Season 6, episode 8), an episode he directed for NYPD Blue.
Time After Time is an American period drama/science fiction television series that aired on ABC from March 5 to March 26, 2017.
 The series, developed by Kevin Williamson, is based on the novel of the same name and was commissioned on May 12, 2016.
 ABC removed the series from its schedule after broadcasting five episodes.
 However, all 12 episodes are being broadcast in Spain and Portugal.

Question: A memorable Andrew Render Stahl role was Tom McHone a character in an  American period drama series which ran for how many episodes?
Answer: twenty