All the full episode spoilers on forums such as spoilthedead.com are correct, Penny, the governor's daughter (?) will show up at the beginning of the episode.
The Walking Dead 3x05 'Say the Word' Promo NEVER BEFORE SEEN
This screenshot is from an advertisement posted on youtube.
There are more videos not found here on the forum mentioned above, including a video of Michonne taking out walkers in the gladiator ring, as the full episode spoilers mentioned.