“ Saturday Night Live ” lost five beloved cast members ahead of its 51st season premiere on Saturday. Ego Nwodim , Heidi Gardner , Devon Walker , Emil Wakim and Michael Longfellow all announced that they were leaving the long-running late night sketch comedy series. At the Emmy Awards in September, SNL boss Lorne Michaels explained the departures. “The show has always brought people in from new, different ages and different generations, and it has to, it’s how it revives itself,” he told “