Ramsay rapes and kills an anonymous girl, and hands her dead body over to Reek to have fun with. When Ramsay spots approaching riders, with his horse lamed, he dresses his servant up as himself and smears himself in the girl's excrement in order to pass as Reek, who then gets shot and killed on his behalf. The person Theon thought was Reek was Ramsay all along, captured and brought to Winterfell but managing to avoid detection because it wasn't widespread knowledge what Ramsay looked like. They only assumed the dead body was Ramsay's because it was wearing his clothes and ring.
Sorry. Hadn't read the other responses first. Yup, the producers jumped the gun on that one. Introducing Ramsay ion the second series would have made more sense. Exactly how did Theon wind up at The Dreadfort after getting knocked out by his own men, and since when do the Ironmen revolt against their leader because they're scared they'll die in battle. Doesn't have much continuity with the feel of the novels. And I still disagree with the producers throwing in a good looking Ramsay Snow.
Edited by The Killer Snark, 18 April 2013 - 03:08 AM.