He locks himself in his room for most of a week and watches movies from his cranial computer it'll break eventually, there aren't any proper surgeons here you'll never fix it, sliding coins under the door when his employees complain they haven't been paid. When he does come out, he kicks the business back into more or less the proper shape and makes slow, slow progress on coal-to-oil conversion and combustion engines the greedy primitives will just use them as war machines.

It's only when he happens to hear of a zombie attack on a neighboring village when he remembers that dark things exist. And one of the dark things that exist are woke shadows.

He scans himself with every still-operational sensor he owns.