 The only means of killing anyone in this new world appears to be complete incineration, which is soon allocated for patients suffering from incurable conditions, such as Gwen's father who suffers a serious stroke after a series of heart attacks, or convicted criminals.In one episode, Jack discovers that an old lover of his, Angelo, had acquired a null field that allowed him to die despite the world's new state of immortality, but he disabled the field as he was concerned that giving anyone control of the field would be giving them control of life and death.Faced with the prospect of actually dying himself, Jack states his resolve to hang on to his life with everything he has ("Immortal Sins"), but willingly puts himself at risk to restore mortality to the world once the cause of this transformation is found, uncertain if his immortality will be restored at the same time ("The Blood Line").