Question:  "Green Arrow" is the 70th episode of a TV series that premiered in what year?

Context articles: Sara Lance
DC Showcase: Green Arrow
Judd Winick
Green Arrow and Black Canary
Green Arrow: Year One
Oliver Queen (Arrow)
Arrow (TV series)
Dyin' on a Prayer
List of Arrow characters
Green Arrow (Arrow episode)

Sara Lance, also known as the White Canary, is a fictional character in the television series "Arrow", which is based on the DC Comics superhero Green Arrow.
 The character was created specifically for television by Greg Berlanti, Marc Guggenheim and Andrew Kreisberg, but incorporates character and plot elements of the Black Canary, a DC Comics superhero.
 Originally portrayed by Jacqueline MacInnes Wood in "Arrow"'s pilot, she has been portrayed by Caity Lotz since the second season.
 She initially fights in "Arrow" under the moniker of "The Canary," translated from her Arabic League of Assassins name "Ta-er al-Sahfer" (Yellow Bird), and later adopts the codename White Canary on the "Arrow" spin-off "Legends of Tomorrow".
DC Showcase: Green Arrow is a 2010 short animated film, directed by Joaquim Dos Santos and written by Greg Weisman, featuring Neal McDonough as Green Arrow, who must protect a young princess at an airport.
 The film, which was released on  28, 2010 (2010--) as a bonus feature on the "" DVD, was the third of the DC Showcase series and was included on the compilation DVD "DC Showcase Original Shorts Collection" in an extended version.
Judd Winick (born February 12, 1970) is an American comic book, comic strip and television writer/artist and former reality television personality.
 Winick first gained fame for his 1994 stint on MTV's "", before earning success for his work on comic books as "Green Lantern", "Green Arrow", and "Pedro and Me", his autobiographical graphic novel about his friendship with "Real World" castmate and AIDS educator Pedro Zamora.
 He created the animated TV series "The Life and Times of Juniper Lee", which ran for three seasons on Cartoon Network.
Green Arrow and Black Canary was a comic book ongoing series published by DC Comics starring superheroes Green Arrow and Black Canary.
Green Arrow: Year One is a 2007 Green Arrow limited series published by DC Comics.
 The series is written by Andy Diggle with art by Jock, the acclaimed team behind "The Losers".
Oliver Queen is a fictional character on the television series "Arrow", based on the DC Comics superhero, Green Arrow, created by Mort Weisinger and George Papp.
 He was adapted for television in 2012 by Greg Berlanti, Marc Guggenheim, and Andrew Kreisberg.
 Oliver Queen has been continually portrayed by Stephen Amell on "Arrow".
 Queen is the alter-ego of the vigilante, "Green Arrow".
 This is the second time the character has been adapted to a live-action television series; the first time was on the series "Smallville", where the character appeared over the course of five seasons and was portrayed by Justin Hartley.
Arrow is an American superhero television series developed by writer/producers Greg Berlanti, Marc Guggenheim, and Andrew Kreisberg.
 It is based on the DC Comics character Green Arrow, a costumed crime-fighter created by Mort Weisinger and George Papp.
 It premiered in North America on The CW on October 10, 2012, with international broadcasting taking place in late 2012.
 Primarily filmed in Vancouver, British Columbia, Canada, the series follows billionaire playboy Oliver Queen (Stephen Amell), who, five years after being stranded on a hostile island, returns home to fight crime and corruption as a secret vigilante whose weapon of choice is a bow and arrow.
"Dyin' on a Prayer" is the 4th episode of season 4 of the supernatural drama television series "Grimm" and the 70th episode overall, which premiered on November 14, 2014, on the cable network NBC.
 The episode was written by Sean Calder and was directed by Tawnia McKiernan.
Arrow is an American television series developed by Greg Berlanti, Marc Guggenheim, and Andrew Kreisberg, based on the DC Comics character Green Arrow.
 Many of the other characters appearing in the series are also based on DC Comics characters.
 The series premiered on October 10, 2012 in the United States on The CW television network, and is currently in its fifth season.
 On January 8, 2017, The CW announced that "Arrow" would be renewed for a sixth season.
"Green Arrow" is the 70th episode overall and fourth-season premiere of The CW series "Arrow".
 The episode was written by showrunners Marc Guggenheim and Wendy Mericle from a story by Greg Berlanti and Beth Schwartz and directed by Thor Freudenthal.
 It was first broadcast on October 7, 2015 in The CW.