No it is prolly just a dream
T.V. Links
She stumbles out of Hershel's barn, a walker, in season two, episode 7, Pretty Much Dead Already.
Season 2 of The Walking Dead has been out for a couple years now, and you can probably find it on Netflix, Itunes, or the Google Play Store.
Yes, Sophia is found in the barn at the Greene farm in the season 2 premiere of The Walking Dead after being missing for a significant period of time.
Yes, she is the last walker to leave Hershel's barn. In episode seven.
T.V. Links
Netflix has season 1 and season 2 available. As of October 2012, season 3 is currently airing on AMC.
As of right now there is no "7th Season" of The Walking Dead TV Series. There's only Season 1 and 2 that have been aired. As previous person has answered as of right now there is no season 7, but before the walking dead became a series it was a comic. If you look it up on the internet you will probably find out what will happen in the future.
No. Hulu Plus does not have Walking Dead. You can find past seasons at Netflix, and more recent episodes on Amazon and iTunes.
No, while we don't yet know specifically, the bag dropped on the ground implies she was snatched by the driver of the Cadillac. Daryll told Beth to run when the walkers overran the mortuary where they had been staying.
Unfortunately we have yet to find a free, legal option to watch the Season 3 episodes.
Season 2|Episode 13 Road to Rhode Island