Back in the day, when Richard Roundtree, Fred Williamson, Issac Hayes, and Pam Grier were stickin' it to the Man, Sidney Poitier and Bill Cosby collaborated on three buddy comedies that offered urban audiences an alternative to private dicks, sex machines, and bad muthas. The Uptown Saturday Nightstars re-team for an "outtasite" scam involving hypnosis, a hopeless beanpole boxer (Jimmie Good Times Walker), and two rival kingpins. Though in fashion and patois Let's Do It Again is a candidate for the '70s time capsule, it does hold up better than most of its more militant blaxploitation brethren. Poitier, the straight man, and Cosby, working his improvisational mojo, are a great comedy team. Worth the price of purchase alone is the sight of these icons decked out in flamboyant Mack Daddy duds to impress their marks, Kansas City Mack (John Amos) and Biggie Smalls (Calvin Lockhart). Curtis Mayfield's score, with vocals by the Staples Singers, is also good for the soul. --Donald Liebenson