Shooting on the final season of The Walking Dead began a few weeks ago in Georgia, and although the series is straying some from thesource material for the season 10 bonus episodes, it looks like the series is jumping back on the tracks for the final season.

There’s more evidence in the latest bit of casting on the show. Deadline is reporting that AMC has signed on Michael James Shaw (Blood & Treasure) as a series regular in the final season. He will play Mercer. Mercer is, indeed, a big deal character. There will probably several more additions to the final season, but there are three crucial additions: Mercer, Sebastian Milton, and Pamela Milton.