Thora Birch has been cast as Gamma, who is not only a sentry for our heroes’ new nemeses, the Whisperers, but a total Alpha acolyte. She is detto to believe 200% in both the group’s animalistic way of life and in their merciless leader.
"Gurira will return in a limited capacity — described as only a handful of episodes — that will be interspersed throughout season 10. [Danai] will then likely segue to the three Film that AMC is planning with former leading man Andrew Lincoln."