William Earl “Tonight Show” host Jimmy Fallon made a surprise appearance on “Saturday Night Live,” crashing host Dakota Johnson‘s opening monologue as she bantered with the night’s musical guest, Justin Timberlake. Johnson opened the show by noting it was her first visit to Rockefeller Center’s Studio 8-H since 2015, when she first hosted “SNL” on the heels of its landmark 40th anniversary special when the audience was packed with notables such as directors Steven Spielberg, George Lucas and Donald Trump, months before he launched his first successful campaign for the White House. On screen a photo of Johnson in that starry crowd flashed.