The Walking Dead - The Walking Dead: Season 2 - Episode 1: All That Remains
...and by "red herring", I mean anyone who isn't a returning character from season 1, which includes Vernon and Molly.
Examples of a red herring:
1) Someone Clementine and Christa met during the sixteen-month gap between Omid's death and ALL THAT REMAINS.
2) The bandit who pleaded for water.
3) Nick and/or Pete.