It’s April 1, 1911, and 32-year-old Albert Einstein — former bureaucrat at the Swiss Patent Office, with a half-decade old doctorate in physics from the University of Zurich — sits in a train car with his two sons and his wife, fellow physicist and mathematician Mileva Marić. They are travelling from Zurich to Prague, where Einstein has landed a job as a full professor in theoretical physics, teaching in the German section of what is now Charles University. He has a few things on his mind, including money troubles, but most critical is his unfinished theory of relativity. When they leave the city 15 months later, Einstein will have cracked the code.