There's only one episode left in Season 4 of AMC's "The Walking Dead." The episode airs next Sunday, Mar. 30. According to different spoilers leaked about the episode, we're sure Episode 16 will have viewers glued to their TVs.

Here's what we know so far about the season finale:

- Glenn, Maggie, Sasha, Bob, Tara, Abraham, Rosita and Eugene arrived at Terminus and were greeted by a woman named Mary. The other characters are on their way.

- Terminus is supposed to be a safe place for "those who survive." There were flyers and signs everywhere but there's been a lot of doubt and speculation that the sanctuary is hiding a deep, dark secret.

- The episode is titled "A" but so far there are no clues as to what it stands for. The synopsis for the episode reads: "Many paths collide; Rick faces sheer brutality; the group struggles to survive."

- A New Zealand television promo was posted on YouTube (and then deleted but you can still check it out below) and hints at some major issues for those at Terminus.

- In the promo Rick, Carl and Michonne arrive at Terminus. However, unlike the first group who just walked right in, they are seen peeking through the gate and checking the place out first. Eventually they do enter, because they are seen walking past the flowers with Gareth.

- It's been rumored for a while Gareth would be making an appearance this season. Not much is known about his character except that he will be a remix of an unidentified comic book character. That could be good or bad news.

- In the promo there's a brief flash of a spooky room with candles. As of now, the purpose of the room is completely unknown.

- Carl, and we think Rick, had their guns drawn inside Terminus right before what looked like Snipers with guns pointed at them came rushing forward. Some are speculating that they get attacked but it could also be a security measure. Rick is also heard asking about the other characters.

- The Marauders catch up with Rick and it looks like they beat him - and possibly Daryl - up.

What do you think will happen in the Season finale episode?