Dhaka, May 8 -- Benedict Cumberbatch will serve as executive producer for a new six-part limited series "The Annecy Murders", based on the real-life Chevaline killings that shocked the world in 2012.

The drama, inspired by true events, centres on the still-unsolved murders of a British-Iraqi engineer, his wife, her mother, and a French cyclist, who were all gunned down on September 5, 2012 near Lake Annecy in the French Alps.

Two young girls, aged four and seven, miraculously survived the attack but were not discovered by first responders for hours.

The case triggered a sprawling, multinational investigation involving authorities in France, the UK, Spain, Israel, Switzerland, and Iraq. Hundreds of officers were deployed and nearly a th...