Question: which American comedy-drama television series, was Paul Michael regular guest star on 
Context: Blaine Devon Anderson is a fictional character from the American musical comedy-drama television series "Glee".  Played by Darren Criss, Blaine was introduced in the sixth episode of the second season as the openly gay lead singer of the Dalton Academy Warblers, a rival show choir to New Directions, the show's primary musical group.  Blaine initially served as a mentor for New Directions member Kurt Hummel (Chris Colfer).  Chemistry between the two, combined with fan support for the couple, led series co-creator Ryan Murphy to pair them romantically.  Their relationship has been well received by critics, and they have been named "one of the most beloved TV couples of the millennium" by Jarett Wieselman of the "New York Post".  At the beginning of the third season, Blaine transfers to McKinley High and joins New Directions; concurrently, Criss was promoted from recurring guest star to the show's main cast. Tara Buckman (born October 1, 1956) is an American television and film actress.  Her active career was mainly confined to the late 1970s to the mid-1990s.  Though never reaching feature status, Buckman was nonetheless a regular guest star on many television series.  She also appeared in minor roles in feature films. Gilmore Girls is an American comedy-drama television series, created by Amy Sherman-Palladino and starring Lauren Graham and Alexis Bledel.  The show debuted on October 5, 2000 on The WB and became a flagship series for the network.  "Gilmore Girls" originally ran for seven seasons, with the final season moving to The CW, and ended its run on May 15, 2007. The third season of "Shameless", an American comedy-drama television series based on the award-winning British series of the same name by Paul Abbott, premiered on January 13, 2013, at Sunday 9:00 p.m. EST on the Showtime television network.  Executive producers are John Wells, Paul Abbott and Andrew Stearn, with producer Michael Hissrich.  The season concluded after 12 episodes on April 7, 2013.  The shows season premiere brought in 2.00 million viewers, becoming the show highest rated episode ever to-date.  The episode airing February 17, "The Sins of My Caretaker", received 1.31 million total viewers, its lowest rated episode of the season.  The season finale scored 1.82 million viewers. Marilyn McIntyre (born May 23, 1949) is an American television and film actress.  She has had contract (series regular) roles in the television series "Watch Over Me", "Days of Our Lives", "One Life to Live", "Loving", and "Search for Tomorrow", and recurring guest star roles on "LA Law", "Judging Amy", "", "General Hospital", "The Young and the Restless", and "Ryan's Hope".  Ms. McIntyre has had guest star roles on numerous television series including "Chicago Hope", "The X-Files", "Dark Skies", among several others, and her film appearances include the recent hit of several shorts film festivals, "Into the Unknown", starring opposite her real-life significant other, James Harper; the smash-hit short, "George Lucas in Love"; "First Daughter", "What's Bugging Seth" (2005), "The Ring Two" (2005), and several others.  She has a varied background in theatre/stage performances and has appeared in leading roles on Broadway, Off & Off Off Broadway and in many of the country's leading regional theatres, including the Arena Stage (Washington, DC), Mark Taper Forum, South Coast Repertory, Houston's Alley Theatre, Missouri Rep, Walnut Street Theatre, and many others.  She received her training (BFA Degree) at the North Carolina School of the Arts, and her MFA in the graduate program at Pennsylvania State University.  Ms. McIntyre is an acting teacher and coach, currently teaching at California State University Northridge, North Carolina's Elon University summer program, "Elon in LA: Climing the LAdder", and the private Howard Fine Acting Studio and Ted Brunetti Studio, both in Hollywood.  McIntyre was born in Erie, Pennsylvania, the daughter of Jeanne Ellen (née Corzilius) and Roger McIntyre, an aeronautical engineer. The fifth season of "Shameless", an American comedy-drama television series based on the award-winning British series of the same name by Paul Abbott, premiered on January 11, 2015 on the Showtime television network.  Executive producers are John Wells, Paul Abbott and Andrew Stearn, and producer Michael Hissrich.  Like all previous seasons, the season consisted of 12 episodes. The fourth season episode 10 of "Shameless", an American comedy-drama television series based on the award-winning British series of the same name by Paul Abbott, premiered on January 12, 2014, at Sunday 9:00 p.m. EST on the Showtime television network.  Executive producers are John Wells, Paul Abbott and Andrew Stearn, with producer Michael Hissrich.  The season concluded after 12 episodes on April 6, 2014.  The shows season premiere brought in 1.69 million viewers, while the episode airing February 2, "Strangers on a Train", received 1.22 million total viewers, its lowest rated episode of the season.  The season finale scored 1.93 million viewers, becoming the show highest rated episode for the season. Paul Michael (August 15, 1926 – July 8, 2011) was an American actor.  He was a regular guest star on American television appearing in "Kojak", "Hill Street Blues", "Alias", "Gilmore Girls" and "Frasier".  He played a cop in the Hollywood movie "Batman".  He also played King Johnny Romano on "Dark Shadows".  He was also in movies such as "Mask of the Red Death" and the TV movie "Where There's a Will".  He was best known for his appearances on Broadway where he frequently played the title role in "Zorba the Greek", Tevia in "Fiddler on the Roof", and the barber in "The Man of La Mancha".  He danced in "Bells are Ringing" with Vivian Leigh. Ken Nishida (西田 健 , Nishida Ken , born June 24, 1945) is a Japanese actor and voice actor.  He is noted for his roles in "Return of Ultraman", "Eyeful Daisakusen", "Uchuu Keiji Gavan", "Ninpuu Sentai Hurricaneger", "G-Men '75", and "Shin Kyoto Meikyū Annai."  His guest roles have included multiple episodes of "Key Hunter", "Mito Kōmon", "Taiyō ni Hoero! ", "Zenigata Heiji", and "Abarenbō Shōgun".  He is also a regular guest star in the two-hour prime-time special drama format, with 35 appearances on the Tuesday "Kayō Suspense Gekijō" and 25 on the Saturday "Doyō Wide Gekijō".  A veteran "jidaigeki" actor, Nishida portrayed the recurring villain Mugensai who masterminded the plot to assassinate the shogun in the series "Shogun Iemitsu Shinobi Tabi Part II."  He appeared as Asano Daigaku, younger brother of the daimyo whose forced "seppuku" triggered the events of the Forty-seven ronin, in "The Fall of Ako Castle".  A modern role was in the 1986 Kei Kumai film adaptation "Umi to Doku" of the Shusaku Endo novel of the same name (translated as "The Sea and Poison").  Three films in the "Gokudō no Onna-tachi" series of gangster films are also to his credit.  In anime, Ken provided the Japanese voice of Kazundo Gouda in "". The first season of "Shameless", an American comedy-drama television series based on the award-winning British series of the same name by Paul Abbott, premiered on January 9, 2011, at Sunday 10:00 p.m. EST on the Showtime television network.  Executive producers are John Wells, Paul Abbott and Andrew Stearn, with producer Michael Hissrich.  The season concluded after 12 episodes on March 27, 2011.  The shows season premiere was watched by 982,000 viewers, making it the network's biggest turnout for a series premiere since "Dead Like Me" in 2003.  The episode airing January 30, "Casey Casden", received 1.45 million total viewers, making "Shameless" the best performing first-year drama on Showtime.  The season finale scored 1.16 million viewers.
Answer: Gilmore Girls