in May of 1974 when a Florida man named Terry Betz

found on his island property this curious metal sphere,

now known as the Betz sphere.

They took it home, they didn't know what it was.

WILLIAM HENRY: They thought it looked like, uh,

a downed NASA satellite or maybe a Soviet satellite.

So, Terry just puts it in a windowsill

for a couple of weeks.

Then, one day, he has a friend over,

and as he's playing the guitar,

the sphere suddenly starts to come alive.

It starts making humming sounds and it seems to be responding

to particular notes played by the guitar.

JEFF WILLIAMS: Then another thing he noticed

is that if you put the sphere on the ground,

it'll roll away from you and then roll back

to the person who rolled the sphere initially.

If you put it on a tabletop, it'll roll around the tabletop,

but never off the edge of the tabletop.

Then strange things started happening.

Doors in their houses started slamming on their own.

And they began hearing organ music in the house at night.

And this started to really concern them.

CHILDRESS: They had the military and NASA

come and look at this sphere to see if it was some kind

of military device or, uh, some piece

of a spaceship or something like that.

Both of them said, "No, we don't know what this is."

HENRY: Well, the Betz family decided

to consent to further testing at the nearby naval station.

And after X-raying the sphere, they found out

that it wasn't hollow; that there, in fact,

were two spheres within that sphere.

WILLIAMS: It had magnetic poles.

And these poles would shift and move around on their own accord.

It would defy logic.

How are these spheres moving?

And they also noted that it was sending out radio waves.

CHILDRESS: In the end, no one could ever

explain it, so it was kept with the Betz family.

And today we don't know where this sphere is, in fact.

But you have to ask yourself,

what was this strange metallic sphere?

What was it made of?

How could it do all of the strange things

that it was doing?

LINDA MOULTON HOWE: Where is the Betz sphere today?

And what information is it gathering and communicating back

to whoever made this strange thing in the first place?

That's what I want to know.

Our government has probably learned a great deal

about a sphere that has self-activating software

and maybe has been sending and receiving

to other intelligences the whole time.