Atlantic City's tangled web of betrayal, political scheming and murder came full circle in 'Boardwalk Empire's' shocking Season Two finale. After a season of trying to take down Nucky Thompson, Jimmy Darmody finally realized how foolish he'd been to move against his former mentor, but it was too late. Even after Darmody helped make his election fraud charges disappear, Nucky repaid him with two shots to the head, an abrupt end of the line for one of the show's most compelling characters.

To keep track of the deals, deception and death, AOL TV presents the final Season Two installment of our 'Boardwalk Empire' gangster index, a guide to who's up and who's down among HBO's organized criminals.

Check out the index to find out how your favorite liquor-slinging sociopath fared this week ...

It was a showdown two seasons in the making, and finally in this week's season finale, it was Nucky versus Jimmy on 'Boardwalk Empire' (Sun., 9PM ET on HBO). After all the damage and ruckus Jimmy has caused Nucky over the past season, it was inevitable that it would come down to the two of them.

Jimmy was once Nucky's right-hand man. He was the heir apparent to Nucky's bootlegging throne in Prohibition-era Atlantic City, but it just wasn't enough for Jimmy. Unfortunately, his ambition was more than his intellect could handle, and he found himself in over his head.