The Walking Dead returned on Sunday night with a record-breaking 16.1 million viewers tuning in, so it's safe to say that interest in the AMC series is at an all-time high. Today, the network released a behind-the-scenes featurette, which includes footage from the set and interviews with Andrew Lincoln, who reveals the prison group has built a "functioning community" this year, Norman Reedus, executive producer Gale Anne Hurd and several other crew members. In addition, AMC has put the entire Season 4 premiere episode, "30 Days Without an Accident" online at