Kohinoor is a 2005 mystery-thriller Indian television series based on the popular American novel, The Da Vinci Code. The series premiered on September 5, 2005, and aired on every Monday to Thursday at 10pm IST on Sahara One channel, starring Kuljeet Randhawa in the lead. It became a success due to its stylised promotions and marketing and was acclaimed for its noble story and theme. Besides, to promote the series, the channel launched a Diwali contest named "Kohinoor Ki Diwali Heeron Waali" from October 17 to 31, where it gave away 45 laks worth of diamonds to 300 randomly selected participants.