Question: Blackwater is an episode in season 2 of the fantasy drama series that premiered on what date?

Context paragraphs:
Gangland Undercover: Gangland Undercover is an American factual based drama television series written and created by Executive Producer Stephen Kemp and co-writer Noel Baker.  It was inspired by the story of Charles Falco a former ATF confidential informant (CI) who infiltrated an outlaw motorcycle club.  The series is based on Falco's 2013 memoir, "Vagos, Mongols, and Outlaws: My Infiltration of America's Deadliest Biker Gangs".  It premiered on Tuesday, February 24, 2015, on the History Channel at 10/9c.  In Canada, Season 2 premiered on September 26, 2016.  In the U.S., only the first episode of season 2 aired on December 8, 2016 on A&E.  According to the trailer, "the new season" (Season 2) premiered on March 2, 2017.

Angry Birds Stella (TV series): Angry Birds Stella is a Finnish computer-animated TV series based on the game "Angry Birds Stella" that was produced by Rovio Entertainment.  The first episode, "A Fork in the Friendship", aired on ToonsTV in November 1, 2014.  The series recounts the tale of Stella, along with her friends Luca, Willow, Poppy and Dahlia, as they work their way against Gale, the former friend of Stella, that is the queen of the pigs in Golden Island.  The first season focuses on Gale trying to hunt for the Golden Egg, but, fails as seen in the final episode of season 1, "To The Bitter End".  The second season focuses on Gale returning and trying to hunt for the Golden Egg again, and she succeeded as seen in "The Golden Queen", the 9th episode of season 2.  Also, Dahlia, one of the birds, tries searching for the egg as well for an experiment, but this time, she fails, as seen in "It's Mine!" , the 6th episode of season 2.  Soon enough, the birds realize how dangerous this egg can be, as seen in "Premonition", the 11th episode in season 2, which in when Gale with the Golden Egg, anything that is touched with it, turns to gold.  However, when that happens, another thing turns to stone, the opposite of gold, which causes nature, and even worse, food to be turned to stone as well.  Now, it is up to the Stella gang to save Golden Island before it is too late.  They do succeed, as seen in "You Asked For It", the 13th and final episode of season 2 and the series finale of "Angry Birds Stella", where after a long awful night, Stella and her gang launch the Golden Egg out of the island, never to be seen again.  Gale does not mind because when she saw the Golden Egg after she broke out of the gold in the episode, she ran away, back into her castle.

Game of Thrones (season 2): The second season of the fantasy drama television series "Game of Thrones" premiered in the United States on HBO on April 1, 2012, and concluded on June 3, 2012.  It was broadcast on Sunday at 9:00 pm in the United States, consisting of 10 episodes, each running approximately 50–60 minutes.  The season mostly covers the events of "A Clash of Kings", the second novel of the "A Song of Ice and Fire" series by George R. R. Martin, adapted for television by David Benioff and D. B. Weiss.  HBO ordered the second season on April 19, 2011, which began filming in July 2011, primarily in Ireland, Northern Ireland, Croatia and Iceland.

An Untold Story: "An Untold Story" is the twenty-third episode of the fifth season of the American fantasy drama series "Once Upon a Time", which aired on May 15, 2016.  The episode served as part 2 of the 2-part fifth-season finale, with the first part being "Only You".

Going Home (Once Upon a Time): "Going Home" is the eleventh episode of the third season of the American fantasy drama series "Once Upon a Time", and the show's 55th episode overall.  The episode served as the season's winter finale, and marked the first time in the series that six different story lines were used: four involving the character's past, one in the present, and a combined alternate past/fast forward outcome, the latter setting things up for a new chapter in the series.

Snow Drifts: "Snow Drifts" is the twenty-first episode of the third season of the American fantasy drama series "Once Upon a Time", and the show's 65th episode overall, which aired on May 11, 2014.  The episode serves as the first of a two part episode for the third season finale and was written by David H. Goodman & Robert Hull and directed by Ron Underwood.

A Tale of Two Sisters (Once Upon a Time): "A Tale of Two Sisters" is the first episode of the fourth season of the American fantasy drama series "Once Upon a Time", which aired on September 28, 2014.  The episode introduces several characters from "Frozen" to the series.  The episode also has the characters deal with the consequences of Emma Swan (Jennifer Morrison) and Killian "Hook" Jones's (Colin O'Donoghue) time traveling in the third season finale.

Birth (Once Upon a Time): "Birth" is the eighth episode of the fifth season of the American fantasy drama series "Once Upon a Time", which aired on November 15, 2015.  The episode serves as the first part of a 2-episode airing night that were unrelated, with the second part being "The Bear King."

There's No Place Like Home (Once Upon a Time): "There's No Place Like Home" is episode twenty-two of the third season of the American fantasy drama series "Once Upon a Time", and the show's 66th episode overall, which aired on May 11, 2014.  The episode serves as the conclusion of a two-part season finale with "Snow Drifts", written by series creators Edward Kitsis & Adam Horowitz, and directed by Ralph Hemecker.

Blackwater (Game of Thrones): "Blackwater" is the ninth and penultimate episode of the second season of HBO's medieval fantasy television series "Game of Thrones".  The episode is written by George R. R. Martin, the author of the "A Song of Ice and Fire" novels of which the series is an adaptation, and directed by Neil Marshall, his directorial debut for the series.

Supporting paragraphs: Blackwater (Game of Thrones) Game of Thrones (season 2)
Answer: April 1, 2012