Everyone knows the story of the Titanic. On a frigid evening in 1912, the passenger ship hit an iceberg and sank in the North Atlantic, killing over 1500 people. Only around 700 survived.Six of those survivors were Chinese men. Their stories have never been told - until now.The Six is a new documentary that tells the untold story of those men, and it's hitting theatres in China on April 16.It’s directed by Arthur Jones and its lead researcher is Steven Schwankert. Both joined host Haig Balian in studio in Beijing.

How the story of the six Chinese survivors is a "complete mystery hidden in something that was well known."

When an early trailer got 22 million views, things got a whole lot bigger.

Lead Researcher Steven Schwankert on the odyssey of researching this film: “the map is not the territory. ”

Schwankert on the scale of The Six: “If you get involved with anything on Titanic and you didn’t realize that it would be big from the start, then your start was wrong.”

Jones on the unique challenge of tracking down Chinese genealogy.

Schwankert: “I don’t lie in bed at night thinking about the universe or the existence of God. I think about shipwrecks.”

The Six as the story of Chinese immigration to North America.

Schwankert on building a replica of a Titanic lifeboat: It's about filtering out  emotion and replacing it with evidence to create a more accurate picture of what happened.

Jones on 'women and children first'. Apart from Titanic do we ever talk about that?

On pushback from the Titanic community, who said  “you just have to accept they did something wrong.”

The lengths the filmmakers went to to simulate how cold the North Atlantic water.

How a video game mockup shook up Titanic modelling orthodoxy and gave the filmmakers new avenues to explore.