Taking a look a back at three of the scariest UFO encounters Ben Hansen has investigated. Catch full episodes of your favourite Quest shows on discovery+: https://bit.ly/36zKyXa Subscribe to Quest TV for more great clips: http://www.youtube.com/subscription_c... Follow Quest on Twitter: ...

Eye witnesses explain some of the craziest real life alien encounters they've ever experienced. Catch full episodes of your favourite Quest shows on discovery+: https://bit.ly/3Dk7rKy Subscribe to Quest TV for more great clips: http://www.youtube.com/subscription_c... Follow Quest on ...

Chuck Zukowski visits witnesses who live in the American Midwest to try and uncover the truth about numerous UFO sightings along the 37th parallel. From Season 2 Episode 1 Catch full episodes of your favourite Quest shows on discovery+: https://bit.ly/3Dk7rKy Subscribe to Quest TV for ...

Carlos De Los Santos managed to live through a pilot's worst nightmare when his plane was cornered and taken over by three UFOs one day. From Season 1 Episode 4 Catch full episodes of your favourite Quest shows on discovery+: https://bit.ly/3Dk7rKy Subscribe to Quest TV for more great ...

Farmers around the world have suffered mysterious mutilations of their cattle and horses for decades and there is still no definitive explanation as to why. Investigators explore the alien and UFO theory in detail. From Season 1 Episode 3. Catch full episodes of your favourite Quest shows ...

Ufologist Dave Rosenfeld shares the video footage and photographs that he took of what appears to be advanced weapons testing, which he believes was reverse-engineered from alien technology. From Season 1 Episode 5 Catch full episodes of your favourite Quest shows on discovery+: ...