TV Talk: Stephen Colbert bids a sci-fi-infused farewell to ‘Late Show’

Throughout Thursday’s final episode of CBS’s “The Last Show with Stephen Colbert,” a green light appeared behind and around Colbert’s desk accompanied by a static sound, foreshadowing a comedic, sci-fi twist to the show’s swan song, perfectly tuned to Colbert’s interest in science fiction and fantasy. Eventually Colbert goes backstage