Gates of Dannemora: For the first time in the history of the United States, a freestanding Church exists inside a prison.

In 2015, two convicted murderers escaped from maximum security Clinton Prison in Dannemora, New York. After three weeks on the run, one inmate was apprehended - - the other shot dead.

Gaining nation-wide attention, Ben Stiller pitches the idea to Showtime to film a docuseries on the escape, casting Benecio del Toro, Paul Dano, and Patricia Arquet.

Stiller's Emmy-nominated production reached millions of viewers but failed to capture the most intriguing story of Clinton Prison.

And that story is...