Spoiler Warning: During The Walking Dead midseason premiere, Tyreese hears a radio broadcast in his mind after he is bitten by a walker. The radio broadcast plays back into a story that Tyreese told Noah earlier about how his father had stressed to him the importance of keeping up with news and current events.
However, the voice on the radio broadcast should have sounded familiar to fans of the show. As many fans guessed on social media, the voice was none other than Andrew Lincoln. On the Talking Dead, both director Greg Nicotero and host Chris Hardwick confirmed that it was Andrew Lincoln's voice on the radio.
Of course, Lincoln wasn't talking in his Rick Grimes voice, but instead he was talking with his normal British accent.