In the beginning of the episode Miles and Nora are setting explosives in the building where the doctor is being held captive. You can clearly see that the "exit" signs are illuminated.. this would be quite impossible since there is no electricity to power them.
Early on in the episode, when Tom Neville walks into the cabin of the steam ship, in the upper right corner of the screen there is a fully functional electronic depth finder.
At the very end of the episode, Randell's henchman is shown reading a Maxim magazine which is from September 2012. This is well after "lights go out".
Rachel and Aaron are in Tonganoxie, KS (west of Kansas City, KS) when Aaron steals a bag of jerky and Curt Thompson tracks them down. Immediately after Rachel shoots Thompson and they are running away, an establishing shot shows a city limits sign for Lenora, KS, 300 miles away (3/4 of the way to Colorado) - quite a distance to track two fugitives over a bag of jerky, which should have been entirely consumed in the course of a 300 mile journey.
In his journal, Aaron comments that the plains are "remarkably flat." While there are some "remarkably flat" areas in Kansas (the state where the episode supposedly occurs), Aaron and Rachel would not have experienced anything but hills for most of their 300 mile overnight sprint from Tonganoxie to Lenora, which would have taken them through the Glaciated Region and the Flint Hills (from Kansas City to several miles west of Manhattan), and then directly into the Smoky Hills of north central Kansas before entering the High Plains about 10 miles east of Lenora.