We've got two versions of Hell on Wheels here: there's the version that's interesting and cool and the version that wants to be cool and isn't. "Immoral Mathematics" is caught in between.
The first version was present in tonight's episode. Instead of dodging the potential season-long will-they-ever-catch-Bohannon- and-Common-err-Elam-for-the-mur der-of-Johnson cliffhanger, the writers dove right into it. The two men who rode up on horses next to Bohannon last week turned out to be Durant employees pretending to ask Bohannon if he'd like Johnson's job and oh would you mind going to this enclosed office space with a suspicious man to talk to him about it.