Question: who brought castiel back to life in season 5
Answer: Although Castiel is confirmed to be dead , Jack , Lucifer 's son , who regards Castiel as his guardian , is able to make Castiel ' wake up ' in the Empty , the place where angels and demons go when they die , and is eventually returned to life when the entity that controls the Empty finds him annoying now that he is the first being to awake in that place .