Episode 1-7
Title: "You Win or You Die"
Directed by Daniel Minahan
Written by David Benioff & D. B. Weiss
Original Air Date -- May 29, 2011
Ned confronts Queen Cersei over the truth of Jon Arryn's death as Robert, mortally wounded during his hunting, prepares to name his successor. Jon Snow takes the vows of the Night's Watch. Khal Drogo summons his army to invade Westeros after Robert conspires to poison Daenerys. Robert appoints Ned as Regent of the Iron Throne, who will rule until his heir is of age. Ned brings the King's declaration before Cersei, Joffrey (eldest of the King's children), and the Small Council. Ned asks Baelish to secure the cooperation of the City Watch in removing the Lannisters from the throne — Joffrey is not Robert's son but Jaime's, he reveals, making Stannis Baratheon (Robert's older brother) the true heir. However, the loyalty of Baelish and the City Watch lies with the Lannisters: Ned is swiftly captured, and his men killed.
Source:
https://en.wikipedia.org/wiki/Game_of_Thrones_(season_1)