It has been 20 years since the catastrophic 2004 Boxing Day tsunami swept across the Indian Ocean and caused death and destruction on an immense scale. | Sky News Australia

After a massive earthquake triggered the deadliest tsunami in recorded history, multiple waves hit the coast of Sri Lanka. Both tourists and locals scramble for safety, as the extent of the wave and its destruction become apparent. Discover the power of the human spirit through stories of hope, hardship, and heroism from the 2004 Indian Ocean tsunami. Parts one and two of Tsunami: Race Against Time premiere tonight at 9pm on National Geographic UK. | National Geographic UK

After a massive earthquake triggered the deadliest tsunami in recorded history, multiple waves hit Thailand. As the waves reach the beaches of popular resorts, locals and tourists work together to save lives. Survivors separated by the waves desperately search for their loved ones. Discover the power of the human spirit through stories of hope, hardship, and heroism from the 2004 Indian Ocean tsunami. Tsunami: Race Against Time premieres Monday November 25th at 9pm on National Geographic UK. | N