5-12: Any Sum Within Reason
Mei is in the crossfire of Chang and Cullen's power struggle.
While continuing the search for his family, Cullen adjusts to life working for the competition on the Central Pacific Railroad.
5-10: 61 Degrees
Against the wishes of Jim Strobridge, Cullen uses nitroglycerin to make strides. Meanwhile, the angry folks of Laramie seek justice against Durant.