Baldwin—who had a long list of credits before Firefly, including Full Metal Jacket and The X-Files—has remained busy, starring and guesting in shows from Stargate SG-1 and Angel to CSI: NY and the much-beloved Chuck, which, unlike Firefly, survived its initial shaky ratings. Baldwin recently made a guest-appearance on his old costar Nathan Fillion’s hit show Castle, a reunion he said was “just like putting on a pair of old boots or a nice, warm coat.”