Celador Films, founded in 1989 and known for the successful TV show 'Who Wants to Be a Millionaire?', underwent ownership changes and was taken over by Complete Communications. The company produces films on a project basis, securing funding through various means such as bank loans and partnerships, with notable productions including 'Slumdog Millionaire' and 'The Descent'. Competing with larger firms like Sony Pictures, Celador has managed to achieve success with a modest budget compared to major studios, showcasing its ability to generate significant profits despite limited releases.