While doing foreign press for The Martian, Sebastian Stan revealed that we'll see more of the Winter Soldier's (aka Bucky Barnes) past in Captain America: Civil War as well as sharing what his character has been up to since the last film and what his relationship status is with Hydra.

"Where we find him after Winter Soldier, he's in a place where he is learning about himself," Stan explained. "And he's discovering -- as you saw in the last scene of The Winter Soldier, at the museum -- he's starting to put the pieces together, starting to learn about the past. Where he's been. What he's done. And as you'll see in the next movie, it doesn't come without a huge price: emotionally, mentally and uh... Yeah, it's not easy for him learn about what he's done."

His character is probably responsible for the death of Tony Stark's father. Will that come up in Civil War? Stan offered, "Without giving anything away, all I can say is that he's a problem for a lot of people."

What's his relationship with Hydra like in Civil War? "You gotta remember it is the same Hydra in a sense that is responsible for him still being alive," he replied. "And what happened before the movie Winter Soldier -- and there will be a lot of things sort of made more clear in Civil War about what happened with him -- kind of setup this relationship that that he may always have with Hydra, one way or another. Because in a way they are like his second family. If that makes sense."

Listen to Stan's comments in the video below.

Marvel’s Captain America: Civil War finds Steve Rogers leading the newly formed team of Avengers in their continued efforts to safeguard humanity. But after another incident involving the Avengers results in collateral damage, political pressure mounts to install a system of accountability, headed by a governing body to oversee and direct the team. The new status quo fractures the Avengers, resulting in two camps—one led by Steve Rogers and his desire for the Avengers to remain free to defend humanity without government interference, and the other following Tony Stark’s surprising decision to support government oversight and accountability. Get ready to pick a side and join the nonstop action playing out on two fronts when Marvel’s Captain America: Civil War opens in U.S. theaters on May.

Captain America: Civil War hits theaters May 6, 2016.