The watch worn by Cillian Murphy, Emily Blunt, and Matt Damon in the upcoming biographical thriller Oppenheimer, directed by Christopher Nolan, is reported to be a one-of-a-kind radioactive watch. The watch features luminous paint that glows in the dark due to the presence of the radioactive element radium. The paint was previously used by Radium Girls, who suffered from terrible deaths after swallowing bits of radium every day while painting dials, leading to a ban on the paint in 1968.