How 'Into the Badlands' pulls off its incredible martial arts fighting scenes

"He’s a really good athlete for a 15-year-old kid," Wu said of Aramis Knight, who plays M.K.

At this point in the show, M.K. is still early in his training. As Sunny's colt, he trains under the seasoned warrior. But he holds a mighty power inside him that's unleashed when he bleeds, and which makes him an important weapon for anyone who controls him.

"I think Aramis is a mine that we can pull from," Wu said. "And so he was really good at doing flips and twists and all the wire work stuff. And so that’s why when you see the dark chi stuff, the dark energy stuff, that happens with him, we use those kinds of moves."

Ally Ioannides seems perfectly cast as the Widow's daughter, Tilda. Although she's young, her mother would've started training her in martial arts at a very young age. Tilda is fast, quiet, and a pro with ninja stars.

“Emily is very good with daggers, I’m very good at hand-to-hand combat, and Ally is very good all around," Aramis Knight told io9.

Of course, because of the magic of Hollywood, the cast's natural talent gets some help from the crew.

"There are also very skillful doubles," Wu said. "They definitely have people that fight for them at certain points, especially the dangerous stuff, and so the integration of all that really has to do with Master Dee Dee’s skill and experience."

The "Into the Badlands" season finale airs Sunday at 10 p.m.