Jay Leno Pinch-Hits For Jimmy Fallon (VIDEO)

Jay Leno made his triumphant return to The Tonight Show after two and a half years to fill in for Jimmy Fallon after Fallon faked an injury during his opening monologue and needed someone to take his place. Leno didn't miss a beat, taking on everything from the Kardashians to the 2016 GOP presidential race. Watch it here!