DVD and Blu-ray finally has a release date: January 10, 2012.
This first season of the acclaimed HBO series featured an appearance by Houdini's brother, Theo. Hardeen, played by Remy Auberjonois in the episode "Paris Green" (check out some reviews here).
Season Two is currently showing on HBO, but I've yet to hear whether Hardeen is coming back.
Pre-order Boardwalk Empire Season One (DVD) on Amazon
Pre-order Boardwalk Empire Season One (Blu-ray) on Amazon