Question: Rick Grimes is a fictional character and the protagonist in the comic book series "The Walking Dead", Grimes is a small town sheriff's deputy who has a son, Carl Grimes is a fictional character from the comic book series, and is portrayed by Chandler Riggs in the American television series of the same name, which airs on AMC, in which country?
Sentence (from "T-Dog (The Walking Dead)"): The character was first introduced in the first season as a member of the group that series protagonist Rick Grimes encounters in Atlanta.
Relevant evidence: No