When does Broken Trail return?

Broken Trail is a 2006 Western television miniseries directed by Walter Hill and starring Robert Duvall and Thomas Haden Church. The story is about an aging cowboy and his nephew who transport 500 horses from Oregon to Wyoming to sell them to the British Army. Along the way, they rescue five Chinese girls from a slave trader, saving them from a life of prostitution and indentured servitude. Compelled to do the right thing, they take the girls with them as they continue their perilous trek across the frontier.