As fans await the debut of the upcoming fifth and final season of 'Boardwalk Empire', lead actor Steve Buscemi revealed what fans can expect to see when the popular HBO series returns this Sunday.

"Of course, it's sad, but I'm also happy with all the work that we did and I'm very proud of the work and it's just great to see everybody here," said Buscemi to CBS News on the red carpet on September 3 to commemorate the debut of the Season 5 premiere episode, "I think this season, Nucky takes a little bit of a look inward," said Buscemi.

The 56-year-old Brooklyn, New York native's co-star Michael K. Williams (who plays Albert "Chalky" White) also mentioned how the setting of the series which originally took place in the Roaring 1920's (aka the Prohibition Era) will change to a different period this season.

"The storyline has jumped seven years [into the future], which is why I have the beard now," said Michael K. Williams, according to a Christian Post report, "The Depression has set in. The days of the shiny shoes and fancy suits are long gone.

"Nucky (Steve Buscemi) is awash in memories from pier-boy days growing up in 1884 Atlantic City, when the young Nucky (Nolan Lyons) caught the eye of the Commodore (John Elllison Conlee). In 1931 Cuba, Nucky joins Sally Wheet (Patricia Arquette) and, with a U.S. Senator in tow, forges ties with Bacardi Rum in hopes of Prohibition's repeal in the U.S," according to the official synopsis of upcoming first episode titled 'Golden Days for Boys and Girls' airing on September 7.

"Working on Wall Street, Margaret (Kelly Macdonald) finds herself in the hot seat when her boss, facing an internal investigation, decides his own future. Down but never out, Chalky (Michael Kenneth Williams) seizes an opportunity to extricate himself from a difficult situation. In New York, Lucky Luciano (Vincent Piazza) sets in motion a bold plan that reverberates all the way to Nucky in Cuba."

'Boardwalk Empire' will return for its fifth and final season on September 7 at 9 pm EST on the HBO network.