Entertainment Weekly is reporting that season five of Game Of Thrones will include flashbacks, a technique that has not yet used in the series.
From Entertainment Weekly:
Showrunners David Benioff and Dan Weiss revealed the season would have a flashback during a Q&A with film students in Spain, where the show is shooting portions of its upcoming season. Here is the quote, which is roughly translated from a Spanish website and was not attributed to a particular producer: “By making the first season, we set a rule: No prophecies, dreams or flashbacks. We failed the first two and this season the third. So yes, this season will finally have flashbacks.”