MUMBAI: His story of courage under fire is known to millions; and now cricketer Yuvraj Singh will narrate tales of people displaying true valour in the face of calamity in National Geography?s ?The Unbreakables? series.

Premiering on Christmas Eve 24 December at 10 pm, the show that will air Monday-Friday will salute the spirit of never giving up, rendering tales of individuals emerging victorious after landing in ill-fated circumstances.

From being captured and held hostage by guerrilla groups while on an adventure tour, to being forced to smuggle cocaine at gun-point - the series showcases testing times and how a fighting spirit makes ordinary people do extraordinary things. Known for this dauntless spirit, Singh would be introducing audiences to these gripping stories as the face of the show.

National Geographic Network, Fox International Channels India VP marketing Debarpita Banerjee said, "This series is an amazing collection of nerves of steel, for which one has to keep sanity in the face of direst of adversities. The Unbreakables will take viewers inside firsthand accounts of unexpected captivity, imprisonment and pure terror. We are very excited to have Yuvraj Singh present this series as for our country he is the epitome of life back on track."

Singh said, "I have tremendous respect for people with a profound positive attitude who face dire situations head-on and emerge stronger from them. The Unbreakables is a series that recounts formidable incidents, while outlining sheer strength that people exude when the going gets tough. It?s truly an honour to be associated with the National Geographic Channel and be a part of their endeavour to celebrate undying spirit."