Looks like Rick's group will need all the help they can get against the Governor's forces, and help is coming...
Chad Coleman (
The Wire) has been cast as Tyreese, who was for a time a central character in the comic books. Tyreese is scheduled to appear this season.
Another returning face is Morgan Jones, played by Lennie James. Rick met Morgan and his son Duane way back in the series' pilot episode.