AMC has revealed a promo and clip from the season finale of The Walking Dead entitled A. The clip follows Rick, Carl and Michonne setting a trap for an animal, but being interrupted by a noise in the distance. We also have two behind-the-scenes featurettes from Us, which feature the cast and crew talking about how they put the tunnel scenes together. Check out the promo for the finale and watch A Sunday, March 30rd at 9pm ET on AMC.