Question: when the cast member who co-wrote Episode 20 of the first season of M*A*S*H born ?

Context articles: Edgeworks Entertainment
McLean Stevenson
The Army-Navy Game (M*A*S*H)
Burt Hummel
Ellen Cleghorne
List of Twin Star Exorcists episodes
Hawaii Five-0 (2010 TV series, season 2)
Over the Rainbow (Angel)
Geordie Shore (series 8)
Go Fish (Buffy the Vampire Slayer)

Edgeworks Entertainment is a machinima and new media production company created by Alexander Winn and Ryan Luther.
 At midnight on February 9, 2005, Episode 1 of their new machinima series was released.
 "The Codex" crew, which then consisted of Alexander Winn, Ryan Luther, Patrick Malone and Meghan Foster, all got together to celebrate the launch of the "The Codex Series".
 Lauren Jenks joined the crew after a few months, and the series reached 20 episodes before it ended on August 13, 2005, when Episode 20, "The End of All Things", was released.
 On February 9, 2006, Edgeworks Entertainment announced their new addition to "The Codex Series", "The Heretic", with the addition of three more members of the staff, and again on February 9, 2007 the first episode was released.
 In 2009 Edgeworks launched a community-driven review site called "Vox Populi" and 2010 sees their newest creation, a live-action webseries named Radical.
Edgar McLean Stevenson Jr. (November 14, 1927 – February 15, 1996) was an American actor most recognized for his role as Lt. Colonel Henry Blake on the TV series "M*A*S*H".
 He was also recognized for his role as Michael Nicholson on "The Doris Day Show".
"The Army–Navy Game" is episode #20 of the first season of the TV series "M*A*S*H", originally airing on February 25, 1973; its repeat on September 9, 1973 was the last official telecast in "M*A*S*H"' s first season on CBS.
 The episode was co-written by cast member McLean Stevenson ("Lt. Col. Henry Blake").
Burt Hummel is a fictional character from the Fox musical comedy-drama series "Glee".
 The character is portrayed by actor Mike O'Malley, and first appeared on "Glee" in the fourth episode of the first season, "Preggers".
 Burt was developed by "Glee" creators Ryan Murphy, Brad Falchuk and Ian Brennan.
 He is the father of gay glee club member Kurt Hummel (Chris Colfer), and works as a mechanic in Lima, Ohio where the series is set.
 He eventually begins a relationship with Carole Hudson (Romy Rosemont), the mother of another glee club member, and the two marry in the second season episode "Furt".
 In the third season, Burt runs in a special congressional election and wins.
 O'Malley was a recurring cast member during the first season, and was upgraded to a series regular for the second season of the show, but returned to the recurring cast for the third season.
Ellen Cleghorne (born November 29, 1965) is an American actress and comedian, best known as a cast member of "Saturday Night Live" from 1991 to 1995.
 Cleghorne was the sketch comedy show's second African-American female repertory cast member, succeeding Danitra Vance in its eleventh season, and the first African-American female cast member to stay for more than one season.
 She returned for its 40th anniversary special on February 15, 2015.
 Cleghorne was ranked the 69th greatest "Saturday Night Live" cast member by "Rolling Stone" magazine.
Twin Star Exorcists is an anime series produced by Pierott based on a manga series of the same name by Yoshiaki Sukeno.
 The series began airing between April 6, 2016 to March 29, 2017 on TV Tokyo and other TX Network stations, and later on AT-X.
 The series follows the same plot as the manga until episode 20, however, from episode 21 the series diverges into an original story, that is not featured in the manga.
 The series' first opening theme song is "Valkyrie -Ikusa Otome-" (Valkyrie -戦乙女- ) by Wagakki Band, while the first ending theme is "Eyes" (アイズ , Aizu ) by Hitomi Kaji.
 The second opening theme, "Re:Call", is performed by the idol group i☆Ris, while the second ending theme, "Yadori-boshi" (宿り星 ) is performed by the two-man group Itowokashi (Kashitarō Itō and Ryō Miyada).
 The third opening theme, "sync" is performed by lol the music director, while the third ending theme "Hide & Seek" is performed by Girlfriend.
 The fourth opening theme, "Kanadeai" is performed by Itowokoashi, while the fourth ending theme "Hotarubi" is performed by Wagakki Band.
The second season of the CBS crime drama series "Hawaii Five-0" premiered on September 19, 2011.
 The season continues to center on the "Five-0", a specialized task force established by the Hawaiian Governor that investigates a wide series of crimes on the islands, including murder, terrorism and human trafficking.
 The second season introduces a new governor, Sam Denning, after the murder of his predecessor, Patricia Jameson.
 However, unlike Jameson, Denning orders new changes to the task force.
 The season includes two more main cast members, Masi Oka, who recurred in the first season, and Lauren German, who departed after episode 16.
 Alex O'Loughlin appears briefly in episode 20 and does not appear in episode 21 as he was seeking drug treatment for pain management medication during the production of those two episodes.
"Over the Rainbow" is episode 20 of season 2 in the television show "Angel", originally broadcast on the WB network.
 This episode begins immediately where the previous ends: Cordelia has been inadvertently sucked into a dimensional portal.
 She ends up as a slave in an alternate world called Pylea, until her owners learn of her precognitive visions.
 Back in Los Angeles, Angel, Wesley and the Host attempt to rescue Cordelia, while Gunn discovers he has alienated his old street gang.
The eighth series of Geordie Shore, a British television programme based in Newcastle upon Tyne was confirmed in October 2013 after cast member Holly Hagan announced it on Twitter and is expected to air 22 July 2014.
 Filming began for this series on 25 March 2014.
 This series will be the first not to feature former cast member Sophie Kasaei after she was axed during the seventh series following a racial slur.
 All other cast members from the previous series return with the addition of new cast member Aaron Chalmers who had briefly appeared during series two of the show as a one-night stand of Holly's.
 In May 2014, Gaz announced that the series would begin in July.
 An exclusive first trailer for the series was released during an episode of Ex On The Beach on 3 June 2014.
 It was revealed on 10 June 2014 that another new cast member had joined, 21-year-old Kyle Christie.
"Go Fish" is episode 20 of season two of the television series "Buffy the Vampire Slayer".
 It was written by David Fury and Elin Hampton, directed by David Semel, and first broadcast on May 5, 1998.