We love all of Pretty Little Liars’ constant thrills and surprises, but at the end of every episode, it always seems as though we have more questions than answers — and that was especially true this week.

To that end, we’ve tackled the biggest questions from this week’s episode in order to figure out what’s really going on in Rosewood, and to pick up on any and all clues.

Here are 10 questions from Season 4, Episode 22: “Cover for Me.”

1. Did Spencer bury Ali alive?

“A” certainly wants Spencer to think she buried Ali alive, given the dirt that Spencer finds in her bed. But did Spencer really put Ali in the grave? Frankly, we think there’s no chance Spencer did that, but it seems Mrs. D wants Spencer’s parents to think it, so Mrs. D can maintain power over them. We’re thinking Mrs. D is not a nice lady.

2. Is Spencer actually chasing after Sara Harvey, not Ali?

OK, so this is a pretty outlandish theory. But you can see the face of the person whom Spencer chases through the woods this week and it isn’t Ali’s face. Dun, dun, dun. Now, the logical conclusion to draw is just that this is a stunt person filling in for Sasha Pieterse. But could this perhaps be Sara Harvey the Ali lookalike and maybe Spencer somehow ends up killing her?

3. Why was Toby’s letter postmarked in London?

Dean gives Spencer a letter from Toby, and we see that the envelope has been postmarked in London. Huh? We’ve known that Melissa and Wren are supposedly still across the pond there so maybe Toby is somehow interacting with them. Either that, or Toby really had a strong hankering for some fish and chips, and he decided to go to the source.

Credit: ABC Family

4. Why is Ali’s mom sneaking around in Spencer’s room?

There are certain reasons to enter someone’s bedroom when they don’t know about it, but most of those reasons apply strictly to someone on the housekeeping crew at a hotel. And since we don’t think Ali’s mom was in Spencer’s room to leave a mint on her pillow, we’re worried about what she’s up to. Does Jessica just want to talk with Spencer to see what she remembers about the night Ali died or does she want to do something bad to Spencer?

5. Can we believe Mona’s story about Ezra and Mike?

Mona claims to have had real feelings for Mike, but she says she ended things with him to keep him away from Ezra. However, Mona has been acting suspicious all season long, so we’re not about ready to completely trust her just yet.

6. Does Holbrook think Hanna wrote that note?

Holbrook seems to believe that Hanna didn’t write the note and that it’s actually real. However, we’re curious whether he ultimately decide not to trust Hanna and we’re also wondering exactly what he said to Ali’s mom when he spoke to her near Hanna and Travis’s ill-fated date.

7. Is Ezra right about Mrs. DiLaurentis being “A”?

Ezra is convinced that Mrs. D is “A,” but the show wouldn’t make it so obvious. Instead, we’re actually wondering if Mrs. D is the person who killed Ali or her twin or at least buried her alive. After all, Mrs. D’s quote this week about how a mom shouldn’t have to watch her child die is quite suspicious. Could Mrs. D be trying to frame Spencer for the crime that she herself committed (or thinks she committed, if she doesn’t know Ali is alive)?

8. Will Aria actually get back with Ezra soon?

Ultimately, the show seems to be trying to redeem Ezra, and so perhaps we won’t completely hate him and want to throw things at the TV when he and Aria eventually get back together. But is Aria better off with Ez or with some random new guy? Case in point, she and Riley were awfully cute this week, especially when they were cuddling together on a pier in a very Dawson’s Creek-esque moment.

9. What does Spencer’s mom think that Spencer did when she was on drugs the first time?

Mrs. Hastings clearly believes that Spencer did something very bad during her initial pill-popping addiction two years ago, since Mrs. H says Spence is lucky to not remember what happened. But what does Spencer’s mom think she did? Does she actually think Spencer killed Ali and is this because Mrs. D is telling her that’s what happened?

10. Is there hidden meaning to the words, “Hey, little sister”?

In the promo for next week’s wedding dress-centric episode, we hear a cover of the Billy Idol song “White Wedding” being played over footage of “A” packing up Spencer’s wedding dress. Since the first words of the song are, “Hey, little sister,” does this mean “A” is someone who has a “little sister” like, say, Melissa Hastings? Or maybe the word “sister” is a clue about the twin theory? Then again, perhaps “A” just really likes covers of ‘80s new wave songs.

Catch the next episode of Pretty Little Liars on Tuesday, March 11 at 8 p.m. ET.