HBO has unveiled new video trailers and behind-the-scenes videos from two of their all-new upcoming series, Boardwalk Empire and Treme.

Boardwalk Empire, based on Nelson Johnson's book "Boardwalk Empire: The Birth, High Times and Corruption of Atlantic City", is a prohibition-era crime drama which tells the legendary tale of the gambling mecca's origins. Writing credits will go to The Sopranos' Terence Winter while Entourage pair Mark Wahlberg and Stephen Levinson will produce, all overseen by executive producer Martin Scorsese.

From David Simon, creator of The Wire, Treme begins in fall 2005, three months after Hurricane Katrina and the massive engineering failure in which flood control failed throughout New Orleans, flooding 80 percent of the city and displacing hundreds of thousands of residents. Fictional events depicted in the series will honor the actual chronology of political, economic and cultural events following the storm.

Treme is on HBO this April, while Boardwalk Empire debuts this Fall.