Showtime has unveiled a first look at RJ Cutler’s feature documentary Belushi, about Saturday Night Live icon John Belushi. There will be old and new interviews with friends and co-stars, including Dan Akroyd, Lorne Michaels, Chevy Chase, Harold Ramis, Jane Curtin, Ivan Reitman, Penny Marshall and Carrie Fisher; and letters to his wife,Judy. He died of an overdose at age 33 in 1982.