It began with a fancy Italian dinner Sept. 13, 2011. Now, amidst a wide-ranging federal probe, six of the seven people who ate at Novita that evening are out of a job, including three top United Airlines executives who resigned Tuesday.  Here's a definitive guide to what happened, when.

The characters:

New Jersey Gov. Chris Christie, a former Republican candidate for president

David Samson, Christie's mentor and confidante, Christie's former chair of the Port Authority of New York and Jersey, resigned in wake of Bridgegate scandal

Jeff Smisek, the CEO of United Airlines, resigned as a result of "Chairman's Flight" investigation

Bill Baroni, Christie's former top staffer at the Port Authority, charged with federal crimes for Bridgegate

David Wildstein, Christie's former number two staffer at the Port Authority, guilty of federal crimes for the lane closures in Fort Lee

Nene Foxhall, the former United executive vice president of communications and government affairs, resigned as a result of "Chairman's Flight" investigation

Mark Anderson, the former United senior vice president of corporate and government affairs, resigned as a result of "Chairman's Flight" investigation

Jamie Fox, a former United lobbyist who became Christie's transportation commissioner, before resigning in a swirl of scandal allegations