Celador was founded in 1983 by Jasper Carrot and produced films and television shows, most notably creating the game show "Who Wants to Be a Millionaire?". In 1999, they were acquired by Complete Communications but later bought back their independence. Celador has had success producing films like "Slumdog Millionaire" and "The Descent" on small budgets that generated significant profits. They operate by organizing project-by-project crews and financing productions through means like investment, loans, and distribution deals.