While some may think this is a given, a certain character from Season 3 only signed on for one season, and it has been confirmed that they will be returning for The Walking Dead Season 4.
Unlike many of the original cast members, David Morrissey only signed on for a single season of The Walking Dead and his return wasn't guaranteed at the start. However, The Hollywood Reporter confirmed that Morrissey is back as a series regular for The Walking Dead's fourth season. While having "series regular" status doesn't guarantee that he'll survive the entire season, it does indicate that he'll be a main focus of the upcoming story arc once again.
The Walking Dead cast and crew will return to shoot new episodes, starting in May. Another sixteen episodes are planned for the fourth season, with the first episode airing in October. For those that missed our earlier coverage, here is the official AMC announcement that provided details on Season 4 and confirmed that Scott M. Gimple was replacing Glen Mazzara as the new showrunner:
"...the cast and crew of “The Walking Dead” return to Atlanta, Georgia on Monday, May 6th to begin production on season four. AMC also confirms Scott M. Gimple as showrunner and executive producer for the series’ fourth season to premiere in October with 16 episodes. Gimple has been on the show’s writing staff since season two. Co-Executive Producer, Emmy® Award-winning Special Effects Makeup Supervisor and Director Greg Nicotero and Producer Tom Luse have also been elevated to executive producers. “The Walking Dead” is based on the comic book series created and written by Robert Kirkman and published by Skybound, Kirkman’s imprint at Image Comics. Kirkman, Gale Anne Hurd and David Alpert continue to serve as executive producers for season four."