 Richards is now on the run because when Braddock dies (shown in the flashback episode "To The Gods Alone" which resolved plot points between the pilot and the series), one of his former employees, Fletcher (who did not appear in the pilot), is hired by another billionaire, Arthur Maitland, who also wants access to Richards' blood.The series' dramatic tension is based on the idea that Richards would probably never lose his life if he were to live quietly, since he would never succumb to any known diseases.But his flight from Fletcher puts his life at great risk, constantly engaging in dangerous efforts to avoid capture, and his "immortal" blood did not make him immune to losing his life from trauma.