In Philadelphia, a viral video captures a shapeshifting mass hidden in the clouds leading some to question whether aliens are using our skies for cover. See more in this clip from Season 5, Episode 10, "UFO in Disguise, Sasquatch in the Mail, The Watcher in the Bedroom." Watch new episodes of The Proof Is Out There, Fridays at 10/9c and stay up to date on all of your favorite The HISTORY Channel shows at http://history.com/schedule. If you are interested in submitting videos or other content to be featured on an upcoming season of The Proof Is Out There, head to https://www.history.com/shows/the-proof-is-out-there/articles/do-you-have-the-proof to agree to our Terms and Conditions and submit your content via our Submission Page. #TheProofIsOutThere Subscribe for more from The Proof Is Out There and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT Watch more The Proof Is Out There on YouTube in this playlist: https://histv.co/WatchTheProofIsOutThere Check out exclusive The HISTORY Channel content: History Newsletter - https://histv.co/newsletter Website - https://histv.co/History Facebook - https://histv.co/Facebook Instagram - https://www.instagram.com/history TikTok - https://www.tiktok.com/@history The Proof Is Out There investigates the world’s most mysterious videos, photos, and audio recordings, and uses the best technology and experts to render a credible verdict. Each episode analyzes and passes verdicts on several seemingly impossible things “caught on film,” including giant beasts, UFOS, apocalyptic sounds, hairy humans, alleged mutants from the deep, conspiracies, and many other cases. Host and veteran journalist Tony Harris takes nothing for granted in a quest for answers, tracking down eyewitnesses, putting each photo or film through a battery of tests, calling out the hoaxes, and highlighting the most credible evidence in an attempt to better understand our world. The HISTORY® Channel, a division of A+E Networks, is the premier destination for historical storytelling. From best-in-class documentary events, to a signature slate of industry leading nonfiction series and premium fact-based scripted programming, The HISTORY® Channel serves as the most trustworthy source of informational entertainment in media. The HISTORY® channel has been named the #1 U.S. TV network in buzz for seven consecutive years by YouGov BrandIndex, and a top favorite TV network by Beta Research Corporation. For a deeper dive, visit history.com or follow @HISTORY on Instagram, Twitter, Facebook, YouTube and TikTok. For additional press materials visit the A+E Networks Press Center at http://press.aenetworks.com.