Casting
Connor Paolo
Louis Slotin
Greg Furman
Raemer Schreiber
Drew Waters
Leslie Groves
Coby Larinde
Marion Edward Cieslicki
Tara Alexandra Brown
Nurse Anna
Matt Linton
Theodore Perlman
Manny Spero
Haroutune Krikor Daghlian Jr.
Sam Jacobs
Philip Morrison
Henry Hetz
Samuel Allan Kline
Warren Davis
Israel Slotin
John Alton
Alvin C. Graves
Ryan Lucy
Betty Wilson