Day One is a made-for-TV docudrama film about The Manhattan Project, the research and development of the atomic bomb during World War II. It is based on the book by Peter Wyden. The film was written by David W. Rintels and directed by Joseph Sargent. It starred Brian Dennehy as General Leslie Groves, David Strathairn as Dr. J. Robert Oppenheimer and Michael Tucker as Dr. Leo Szilard. It premiered in the United States on March 5, 1989 on the CBS network. It won the 1989 Emmy award for Outstanding Drama/Comedy Special. The movie received critical acclaim for its historical accuracy despite being a drama. When Hungarian physicist Leo Szilard leaves Europe he eventually arrives in the United States where, with the help of Albert Einstein, he persuades the Federal government to build an atomic bomb. General Leslie Groves selects physicist J. Robert Oppenheimer to head the Los Alamos Laboratory in New Mexico, where the bomb is built. As World War II draws to a close, Szilard (whose idea was responsible for the progress made) has second thoughts about atomic weapons and debates how and when to use the bomb. The film focuses on the organization and the politics of the whole affair, such as tensions between the scientists and the military, the communist affiliation of many scientists around that time, the risks of espionage and the decision whether to use the bomb after Germany is defeated. Concerning the actual scientific work on the bomb, some of it is shown, but not explained, so an understanding of the workings of the bomb is needed to understand what is going on in that respect. The story starts with Leo Szilard fleeing Germany on the last train out and trying to convince the military that a nuclear bomb can be built and that the Germans are already working on it. In England, his idea is filed and ignored, so he travels to the US, but there too, he has to wait a year until something is done with it and Project Manhattan is started.