Article continues below advertisementStephen Colbert is giving fans a rare glimpse into the jokes that never made it onto The Late Show.While accepting the Walter Bernstein Award at the Writers Guild of America East's 78th annual awards ceremony, the outgoing late-night host read aloud several edgy punchlines that were written for his show - but ultimately scrapped before they aired.The moment offered a behind-the-scenes look at how political comedy gets filtered for network television, especially as Colbert prepares to wrap his long-running CBS tenure later this year.