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Project Blue Book trailer goes all-in on UFOs for History

The truth is out there.

Look! Up in the sky! It isn't a bird or a plane. It's probably a UFO, at least if you're watching History's upcoming Project Blue Book drama series.

The series, which was inspired by real UFO studies conducted by the US Air Force starting in the early 1950s, debuts on the History channel this winter. But a first-look trailer shows off its cast, which includes Game of Thrones' Aidan Gillen as Dr. Allen Hynek and Neal McDonough, who plays Damien Darhk in Legends of Tomorrow, as Gen. James Harding. Hynek, a real historical figure, was a scientific adviser for the Air Force's UFO work.

The trailer doesn't leave much to the imagination. We see lights moving in the sky, mysterious crop circles and a bizarrely elongated skull. It seems like it will be stocked with plenty of action, alien intrigue and stylish camera work.

Don't mistake this for a documentary series. History says it will blend "UFO theories with authentic historical events from one of the most mysterious eras in United States history."

You can delve deeper into the real history behind the television show on your own. The Project Blue Book files are available for anyone to peruse through the online Project Blue Book Archive.