We knew that Ethan Embry and Merritt Wever had joined the cast, we weren't sure who they'd be playing. EW spoke with showrunner Scott M. Gimple, who revealed the identities of both of these characters. Wever will play Dr. Denise Cloyd, a surgeon in Alexandria who appears in Robert Kirkman's comic. You can find out much more about her at this link, though be warned: there are some major spoilers for the comics there, which could eventually come to pass in the show.
Embry will play a character named Carter, who Gimple describes as a "combo of a few characters that we actually haven’t hit yet or weren’t able to hit in other characters." He's apparently an amalgamation of characters from the comics and has been in Alexandria "for the whole time, just quite busy." Interesting. In addition to those two actors, Straight Outta Compton star Corey Hawkins will play Heath, a supply runner who also appears in the comics.
So there are a few little mysteries solved while we're waiting for the show to return on October 11th. What do you all think? Check out a couple more photos of the new cast members below: