Question: Matthew Casey is a fictional character portrayed by actor Jesse Spencer on which American drama tv show that debuted in 2012?
Context: Matthew Casey is a fictional character on the NBC drama "Chicago Fire", portrayed by actor Jesse Spencer.  Casey is a lieutenant in the Chicago Fire Department's Firehouse 51's Truck Co. 81. John Rowland is a fictional character portrayed by actor Jesse Metcalfe and created by television producer and screenwriter Marc Cherry for the ABC television series "Desperate Housewives".  The character is introduced as the teenage gardener of one of the titular housewives, Gabrielle Solis (Eva Longoria), with whom she has an affair and cheats on her husband, Carlos Solis (Ricardo Antonio Chavira). Jiminy Glick is a fictional character portrayed by Martin Short in the TV series "Primetime Glick" (2001–2003), the subsequent 2004 film "Jiminy Glick in Lalawood," and Short's Broadway show "".  He began as a recurring character on "The Martin Short Show".  When that show was cancelled, he was spun off into his own series, "Primetime Glick", which ran for three seasons. William "Billy" Kennedy is a fictional character from the Australian soap opera "Neighbours", played by Jesse Spencer.  He made his first appearance on 27 September 1994, arriving in Ramsay Street with his family.  He departed on 5 April 2000, but made a small cameo for the show's 20th anniversary episode broadcast on 27 July 2005. Jackson Avery, M.D. is a fictional character from ABC prime time medical drama, "Grey's Anatomy", portrayed by actor Jesse Williams.  The character was created by series creator and executive producer, Shonda Rhimes.  He was introduced in season six, episode 5, "Invasion" as a former surgical resident from "Mercy West Medical Center" when it merges with "Seattle Grace Hospital".  Williams initially appeared as a recurring cast member, and was later promoted to a series regular in season seven.  The character's focal storyline involved his attempt to fit in at his new work environment, and trying to finding his own successes, instead of riding on the coattails of his famous family name.  The character has also had significant romances with Lexie Grey and Stephanie Edwards.  He was married but is now divorced to April Kepner.  The couple had a child, Samuel Avery, who died soon after birth.  However, the pair have a daughter, Harriett, who was not named after Catherine much to her dismay.  She was conceived prior to the divorce.  Dr. Avery later becomes a member of the board of directors at the newly established, "Grey Sloan Memorial Hospital", and is the current chairman. Robert Chase, MBBS is a fictional character on the Fox medical drama "House".  He is portrayed by Jesse Spencer.  His character was a part of the team of diagnosticians who worked under Gregory House until the end of the third season when House fires him.  However, he resumed work at the hospital as a surgeon, and was re-hired by House in season 6.  Robert Chase is the longest-serving member of House's staff.  Chase has been attracted to Allison Cameron since the beginning of the show and embarks on a romantic relationship with her in "Human Error."  In "Post Mortem," he left the Diagnostic Team after realizing he was in the same position as he was 10 years earlier, unlike all of the other former members of the team.  However, in the series finale, he rejoins the hospital as the new Head of Diagnostic Medicine, replacing House, who is thought to have died. Jesse Gordon Spencer (born 12 February 1979) is an Australian actor and musician.  He is best known for his roles as Billy Kennedy on the Australian soap opera "Neighbours" (1994–2000, 2005), Dr. Robert Chase on the American medical drama "House" (2004–2012) and Lt. Matthew Casey on the American drama "Chicago Fire" (2012–present). Timmy Martin is a fictional character portrayed by child actor Jon Provost in the long-running television series "Lassie" (1954–1973).  Provost debuted in the first episode of the fourth season, "The Runaway" (1957), as the fictional foster child of farm woman Ellen Miller.  Both the character and its portrayer were hits with the show's audience.  In the middle of the fourth season series star George Cleveland died unexpectedly and producers were forced to overhaul the show.  Timmy was fostered (see season 11 Episodes 9, 10 & 11 when the Martins leave Timmy behind to go to Australia and New Lassie Season 1 episode 7 when Timmy (Jon) now adopted and goes by Steve McCough and June Lockhart are reunited) by newcomers to the series Paul Martin and his wife, Ruth, who purchase the Miller farm. Pāvels Gumennikovs (born January 1, 1986) is a Latvian film director, actor, writer, and producer.  He started his film career in China, where he directed his first film "Kaleidoscope" (2010) that won him a best young director and best film award in Chinese Young Film director Festival.  After that he directed a movie "I love You Riga" that become 3rd highest grossing in a country and was one of the 2 films considered to be nomination for Oscar.  It was the runner out at the end for Oscar nomination (2011) that become one of the most successful movies in Latvia and were screened in cinemas around the country and participated in European Film Festivals, after that he directed a critique very well received TV show "Yes Boss" (2012), that was proclaimed as best made show in Latvia for great acting and directing.  It was a revolutionary TV Show for Latvia, as it was first TV Show shoot in outside locations with scale of Hollywood TV Show production.  The TV Show was shown on Muz-TV channel and TV5 and was seen by 300,000 people online. Kimball Cho is a fictional character portrayed by Tim Kang on the American TV crime drama "The Mentalist".  Cho is a former agent for the California Bureau of Investigation (CBI) and is currently an FBI special agent.  Cho serves as the polar opposite to Patrick Jane, but is keen to learn his powers of observation.  He is portrayed as straightforward and direct, but sometimes makes witty jokes with much of the humour lying in his ability to deadpan.  According to The Mentalist Code, he received his name from Dr. Richard Kimble, just as Red John received his name from Fred Johnson, the one-armed man on "The Fugitive".
Answer: "Chicago Fire"