*As Kelsey Grammer resumes his starring role in the Starz Original series “Boss,” season two welcomes special guest star Tip Harris, known internationally as rapper T.I. (“American Gangster,” “Takers”) as Trey Rogers, a former gangbanger with designs on a career in City Hall. Returning cast member, Rotimi, resumes his role as Darius Morrison, the love interest of Emma [...]