After smashing through cable records with new highs in its Season 4 premiere last week, The Walking Dead settled down a bit last night – though not much. Up against the competition of the ratings powerhouse of the Bronco-Colts game on NFL Sunday Night Football last night, Week 2 of the AMC zombie apocalypse series saw a 12% overall viewership drop from its October 13 show. That’s 13.2 million viewers overall last night from the 16.1 million who watched last week. In terms of the adults 18-49 demo, The Walking Dead got 9.1 million in the category, 13% down from the stellar 10.1 million it had for last week’s season debut. That’s pretty much the same as the dip that the show saw in Week 2 of Season 3 on October 21 last year. However, last night’s viewership and demo result are the show’s second best ever, knocking the March 31 Season 3 finale of the drama down to No. 3 spot in the series’ history. Up until last week that Season 3 finale was The Walking Dead’s best result in both viewership and the key demo. The top Sunday night NFL game of the season so far, Sunday Night Football last night pulled in 25.87 million viewers overall and 12.0 million in the demo, according to fast nationals. However, the 7.12 rating that last night’s Season 4 Week 2 delivered beats everything else non-sports related on TV on Sunday with only the 9.5 of NBC’s NFL Sunday Night Football doing better among regularly scheduled programming. Overall, The Walking Dead is the highest rated non-sports program on TV this fall season though CBS’s The Big Bang Theory and NCIS have pulled in more overall viewers.