A few cool tidbits:
First off, AMC will show a TWD marathon starting at 2:30 (PST) on Sunday, leading up to the season finale, "TS-19."
In the meantime, at www.amctv.com, they have a clip from "TS-19" which seems like they're going attempt to explore the "why is it happening?" discussion a bit in the finale.
More relevant to this thread though, check out "Inside The Walking Dead: 105, Wildfire." In that behind-the-scenes featurette, they directly address Shane's...