Dr Ryan Stone, an engineer on her first space mission, and Matt Kowalski, an astronaut on his final expedition, have to survive in space after they are hit by debris while spacewalking.Dr Ryan Stone, an engineer on her first space mission, and Matt Kowalski, an astronaut on his final expedition, have to survive in space after they are hit by debris while spacewalking.Dr Ryan Stone, an engineer on her first space mission, and Matt Kowalski, an astronaut on his final expedition, have to survive in space after they are hit by debris while spacewalking.