Season 3 of the show about a team of professional problem-solvers is to premiere Jan. 12.
"T.I. will play Lukas, clothing company co-owner with childhood friend Dre -- previously announced guest star Mekhi Phifer -- who enlist Marty [played by Don Cheadle] to help expand their empire," a news release from Showtime said. "Veteran actor Daniel Stern has also signed on to play Tretorn, the chief executive officer of a natural food grocery store chain."
Previous guest stars Griffin Dunne, Bess Armstrong and Jenny Slate are also set to return this season.