--- title: Mark Ruffalo Hooked To a Lie Detector For Avengers Spoiler description: “Is the Hulk secretly a shape-shifting alien known as a Skrull?” Fallon asked canonical: https://time.com/5551579/jimmy-fallon-on-avengers/ author: Melissa Locker article:opinion: false article:content_tier: free article:published_time: 2019-03-14T15:25:19.000Z article:modified_time: 2026-04-13T07:58:04.402Z og:title: Mark Ruffalo Hooked To a Lie Detector For Avengers Spoiler og:description: “Is the Hulk secretly a shape-shifting alien known as a Skrull?” Fallon asked og:url: https://time.com/5551579/jimmy-fallon-on-avengers/ og:site_name: TIME og:image: https://static.time.com/v3/assets/bltea6093859af6183b/blta793ba2c9d573e47/698946b14ee26219943142b4/markruffaloonjimmyfallon.jpeg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 og:image:width: 1291 og:image:height: 726 og:image:alt: MarkRuffaloonJimmyFallon og:type: article twitter:card: summary_large_image twitter:title: Mark Ruffalo Hooked To a Lie Detector For Avengers Spoiler twitter:description: “Is the Hulk secretly a shape-shifting alien known as a Skrull?” Fallon asked twitter:image: https://static.time.com/v3/assets/bltea6093859af6183b/blta793ba2c9d573e47/698946b14ee26219943142b4/markruffaloonjimmyfallon.jpeg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 ---  # Jimmy Fallon Hooked Mark Ruffalo Up to a Lie Detector to Get _Avengers_ Spoilers by [Melissa Locker](https://time.com/author/melissa-locker/) ## Melissa Locker Mar 14, 2019 3:25 PM UTC  by [Melissa Locker](https://time.com/author/melissa-locker/) ## Melissa Locker Mar 14, 2019 3:25 PM UTC Jimmy Fallon really, really wants to know what happens in _The Avengers: Endgame_. Either that or he really, really want to get Mark Ruffalo in trouble with his bosses. Ruffalo, who plays The Incredible Hulk and his mild-mannered alter-ego Bruce Banner in the [Marvel Cinematic Universe](http://time.com/5227935/marvel-cinematic-universe-timeline/), isn’t known for being able to keep a secret. During the lead-up to [_Avengers: Infinity War_](http://time.com/5252727/avengers-infinity-war-review/), Ruffalo [spoiled](http://time.com/5262938/mark-ruffalo-spoiled-avengers-infinity-war/) the film’s dramatic [ending](http://time.com/5255759/avengers-infinity-war-ending-explained/) months before the movie was in theaters. Fallon wanted him to do it again, apparently, so when Ruffalo stopped by _The Tonight Show_ on Wednesday night, the host hooked the Marvel star up to a lie detector to force secrets out of him. “I don’t want to get fired again,” Ruffalo said, as Fallon attached lie detector pads to his temples and started to grill him on all the secrets that he knows about the film. “Is the Hulk secretly a shape-shifting alien known as a Skrull?” Fallon asked, referencing the extraterrestrial spies infiltrating earth introduced in [_Captain Marvel_.](http://time.com/4870052/captain-marvel-movie-timeline-comic-con-2017/) When Ruffalo said he couldn’t answer that, the needle on the lie detector went crazy. In fact, the needle seemed to go crazy a lot. Either Fallon is really good at this, or Ruffalo is really bad at keeping secrets. ```json [{"@context":"https://schema.org","@type":"NewsArticle","@id":"https://time.com/5551579/jimmy-fallon-on-avengers/","mainEntityOfPage":{"@type":"WebPage","@id":"https://time.com/5551579/jimmy-fallon-on-avengers/"},"headline":"Jimmy Fallon Hooked Mark Ruffalo Up to a Lie Detector to Get Avengers Spoilers","datePublished":"2019-03-14T15:25:19.000Z","dateModified":"2026-04-13T07:58:04.402Z","description":"“Is the Hulk secretly a shape-shifting alien known as a Skrull?” Fallon asked","url":"https://time.com/5551579/jimmy-fallon-on-avengers/","keywords":["Newsfeed","jimmy fallon","The Avengers","Late Night Television","Mark Ruffalo"],"thumbnailUrl":"https://static.time.com/v3/assets/bltea6093859af6183b/blta793ba2c9d573e47/698946b14ee26219943142b4/markruffaloonjimmyfallon.jpeg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","author":[{"@type":"Person","name":"Melissa Locker","jobTitle":"","url":"https://time.com/author/melissa-locker/"}],"articleSection":"","image":[{"@type":"ImageObject","url":"https://static.time.com/v3/assets/bltea6093859af6183b/blta793ba2c9d573e47/698946b14ee26219943142b4/markruffaloonjimmyfallon.jpeg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","width":1200,"height":675,"headline":"MarkRuffaloonJimmyFallon","caption":"","creditText":"","representativeOfPage":true}],"publisher":{"@type":"Organization","name":"Time","url":"https://time.com/","logo":{"@type":"ImageObject","url":"https://time.com/images/logo.png","width":528,"height":156},"foundingDate":"March 3, 1923","sameAs":["https://www.facebook.com/time","https://www.instagram.com/time/?hl=en","https://twitter.com/time","https://www.pinterest.com/timemagazine"]}},{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/tag/time-section-newsfeed/","name":"Newsfeed"}},{"@type":"ListItem","position":2,"item":{"@id":"https://time.com/5551579/jimmy-fallon-on-avengers/","name":"Jimmy Fallon Hooked Mark Ruffalo Up to a Lie Detector to Get Avengers Spoilers"}}]}] ```