SPOILERS for The Walking Dead season 9, episode 3 ahead!.

Warning!

AMC's "The Walking Dead" brought back the mysterious helicopter Rick first spotted on season eight.While we've seen Anne react to the helicopter several times now, we're no closer to knowing where the chopper came from or why it continues flying above the air in Virginia. Tonight's Walking Dead finally confirms a long-running theory - the cryptic "A" seen tagged on everything from train cars to shipping containers has a meaning, and it's connected to that mystery helicopter..