On October 21, 1978, Australian pilot Frederick Valentich disappeared while flying a Cessna 182 over Bass Strait.

Shortly before contact was lost, the 20-year-old pilot reported an unidentified object near his aircraft. He described four bright lights, a shiny appearance and a green light as the mysterious object appeared to move around him.

His final radio exchange included the chilling statement:
“It’s not an aircraft.”

Contact was lost shortly afterwards.

A major search failed to locate Valentich or his aircraft, and the cause of his disappearance was never determined.

Was it a tragic aviation accident, misidentification, or something genuinely unexplained?

On October 20, 2024, a U.S. military surveillance mission over Syria recorded an unexplained phenomenon.

The crew described what appeared on their cameras as a “misshapen and uneven ball of white light.”

The phenomenon appeared several times during a roughly 45-minute period and was documented as a UAP. Footage from the encounter, PR31, PR32 and PR33, was later declassified and publicly released.

So what did the cameras capture: an unusual atmospheric or sensor effect, or something genuinely unidentified?

On October 19, 1998, Chinese military radar stations reportedly detected an unidentified object above an Air Force training base near Cangzhou.

An interceptor was sent to investigate, but according to reports, whenever the pilots approached, the mysterious object climbed away.

What was hovering above the base that night?

On October 18, 1973, four U.S. Army Reserve crewmen aboard a Huey helicopter reported a close encounter with a mysterious object over Ohio.

They described a gray cigar-shaped craft passing near the helicopter, projecting a green light into the cockpit, and an unexplained climb of roughly 1,000 feet despite the helicopter being configured to descend.

The encounter was documented in an Army report and remains one of the best-known military UFO cases of the 1970s.

On October 16, 1930, the Foyster family moved into the notorious Borley Rectory in Essex.

On their first day, Marianne reportedly heard her husband calling her from upstairs.

There was just one problem… He hadn't called her.

On October 4, 1967, witnesses in Nova Scotia reported mysterious lights descending into the ocean.

Police responded believing an aircraft had crashed, but no aircraft was missing, and no wreckage was found.

So what entered the water at Shag Harbour?

n October 1958, railwaymen aboard a freight train travelling through Indiana reported four mysterious objects following them through the night.

The encounter continued for more than an hour , and involved multiple witnesses.

What do you think followed the train?

In 1958, enormous human-like footprints appeared around a remote logging site at Bluff Creek, California.

The discovery would help give America's most famous cryptid a name that became known around the world.

Were the tracks a hoax, or something else?
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In September 1965, motorists near Perth, Scotland reported encountering a huge unidentified creature beside a dark country road.

More than 60 years later, the strange encounter remains a mystery.

What do you think they saw?