Actor was cast as the time-traveling mutant opposite Ryan Reynolds last week Josh Brolin is already busying giving ?Deadpool? fans a glimpse into his preparation to play Cable, the time-traveling mutant, in the sequel. ?You know, just meditating. #deadpool2 #clostraphobiarocks#ryanreyondsismybitch #umguys,? the actor posted on Instagram on Tuesday, along with a photo of his face covered in blue molding goop. The scarred, ravaged character has a bionic left arm, a cybernetic eye, and embedded technology that allows him to hack into computer systems.