Cullen ends up in peril when he helps transport a locomotive over the Sierra Nevada Mountains on Hell on Wheels. "Mei Mei" is the second episode of the show's fifth season.
Cullen gets news about his family but what will be the cost to find them on the season premiere of Hell on Wheels? "Chinatown" is the first episode of the show's fifth season.
As the railroad leaves Cheyenne, Cullen returns to find his family on the season finale of Hell on Wheels. "Further West" is the 13th episode of the show's fourth season.