In 2018 a young American missionary, John Chau, was killed by arrows while attempting to contact one of the world's most isolated Indigenous peoples on remote North Sentinel Island in the Indian Ocean.

Chau had ignored repeated warnings from the People of North Sentinel to stay away, but as an evangelical Christian he was determined to bring the gospel to the island’s small population.

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The Mission is a new documentary for National Geographic Films telling John Chao's story; it's co-directed by Emmy Award winner Jesse Moss, who talks to RTÉ Arena above.

The Mission is now screening in selected cinemas nationwide. Listen to more from RTÉ Arena here.