sentences:  During the second and third seasons of the series he was a security officer on the Babylon 5 station.In the fourth season, he was promoted to become Babylon 5's Security Chief and he retains that position through to the end of the series' fifth and final season.Briefly in season 2 and 3, Allan was a member of Nightwatch, a civilian para-police force created by Earth Alliance President Morgan Clark to expose and arrest "traitors to Earth".