Meet an engineer who set up an experiment to find out how many balloons it takes to lift a house.
(01:09)It's not a bird, it's not a plane. It's a house, and it's flying across the sky.
(00:59)A team of Nat Geo remote imaging engineers attempt to deploy crittercams on Great White Sharks.
(02:49)Are spacecraft monitoring a volcano in Mexico city?
(01:08)Ryder, Ben, and James test out the theory that a possible sighting in Mexico was merely oil rigs from a distance.
(03:50)The team meets a journalist who claims to have proof of extra-terrestrial life.
(01:44)Did aliens really crash in the Brazilian jungle?
(01:13)Can the team find any evidence of aliens hiding in the Brazilian jungle?
(02:58)Are aliens keeping an eye on NASA?
(00:40)What is actually flying over the skies of south Florida?
(02:05)The team heads to Arizona to investigate one of the most famous sightings in history.
(01:01)Did the team just catch a glimpse of an unknown craft in the night sky?
(02:37)Getting a tree sample isn't quite as easy as Ryder thought it would be.
(01:54)Could a sighting in the Rockies have something to do with gruesome animal mutilations?
(01:04)A Colorado man claims to have been visited by several alien beings.
(02:50)Is an extraterrestrial responsible for a rash of mysterious cattle deaths?
(02:23)Is a secret military base in California covering up evidence of UFOs?
(00:49)Could a major mass sighting in Texas be proof of life on other planets?
(01:15)Ryder discovers something quite shocking in the night sky.
(01:54)Is there a link between the military and UFO encounters?
(01:04)