The pilot episode, directed by Martin Scorsese, was produced at a cost of $18 million. On September 1, 2009, HBO picked up the series for an additional 11 episodes. The series premièred on September 19, 2010. The series was renewed for a third season, which premièred on September 16, 2012. On October 2, 2012, HBO announced that the series was renewed for a fourth season.
Boardwalk Empire has received widespread critical acclaim, particularly for its visual style and basis on historical figures, as well as for Buscemi's lead performance. The series has won twelve Emmy Awards and has received 30 nominations, including two for Outstanding Drama Series. The series also won the Golden Globe Award for Best Television Series – Drama."
You can easily stream or download it from here (All episodes averaging 150Mb in size):
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