During his seven years on “Saturday Night Live” (NBC, 1975- ), actor and stand-up comedian Tracy Morgan rose to fame playing several memorable characters, including Astronaut Jones, a retro lounge-singing space traveler infatuated with female aliens, and impersonating Mike Tyson, Star Jones and Busta Rhymes. A fearless comic who was always performing whether or not cameras were rolling, Morgan earned a reputation for outrageous behavior, while problems with alcohol led to a career dip following his departure from “S.N.L.” The failure of his own family sitcom, “The Tracy Morgan Show” (NBC,
