The boss is back, but he may not have much time left.

In the Season 2 trailer of the Golden Globe-nominated series "Boss," Mayor Tom Kane (Kelsey Grammer) returns to his duties as mayor of Chicago. Unfortunately, he's still battling an illness that leaves his job in jeopardy. After attempting to fight the symptoms with high doses of medication, Kane experiences a series of psychological setbacks.

"Mr. Kane, you have to know your best days are behind you," one of his advisers says in the trailer above.

In addition to Golden Globe winner Grammer, the series will also see the return of Connie Nielsen, Hannah Ware, Jeff Hephner, Kathleen Robertson, Troy Garity and Rotimi. Jonathon Groff, Sanaa Lathan, Tip Harris and Amy Morton will be appearing on the show this season.

Season 2 of "Boss" premieres on Friday, August 17 at 9 p.m. ET on Starz.

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