This week sees the long anticipated premiere of the most expensive Czech film in history. Medieval, or Jan Žižka as the film is being marketed in Czechia, cost around 450 million crowns and stars actors such as Michael Caine, Ben Foster and Til Schweiger. It focuses on the early life of the famous Czech Hussite general, who was known for his innovative tactics. The movie was written, directed and produced by Petr Jákl, a former Czech judo international and stuntman. I caught up with him and began by asking why he felt that the character of Jan Žižka deserved a film.