Fallout is about nuclear fallout, and it was released 115 days after the Pope’s 87th birthday.
Nuclear=115 *Fallout=87

It was also released on the Pope’s 116th day of being 87 years old. *Nuclear War=116

It was released in the year ’24.

It was supposed to be released on April 12, typically the 102nd day of the year.
World War=102, Art of War=102 (Jesuit text)

And as for the ’39 part, Uranium research began in October of 1939.

It goes with the first Fall Out video game released in October of 1997.

The lead actress in the show is Ella Purnell.

Her full name, Ella Summer Purnell, equates to 217, going with Oppenheimer releasing on 21/7.
Ella Summer Purnell=217