NBCUniversal Inc. March 22, 2018 9:17 am 'Tonight': Jay Leno Tags In to Tell Some Monologue Jokes Former “Tonight Show” host Jay Leno steps in to help Jimmy Fallon tell a few jokes during the monologue. US & World Videos 3:32 Demolition has begun on bridge over Interstate 95 in Norwalk 1:12 5 things to know about Tom Thibodeau 5:02 Demolition of I-95 overpass in Norwalk set to begin after fiery crash 2:38 High Schooler donates 7,000 pounds of homegrown produce to Iowa community 9:45 Orlando Bloom says he's shocked he's still alive after filming his new adventure show