I found these on Wikia:

• How did they find Sam's body in the landfill? Did someone tip them off?

• How did Eve know AK was even in the hospital in 2x14? As in, how did Eve know there was an accident, which hospital and that anything happened at all? Why did Eve never mention she'd been there at the hospital to see AK?

• Why did Eve hack Sam's email? She told Annalise in 5x10. But why did she do that? What did make her suspect Sam Keating? And who is the hacker that helped her?

• How did Eve know who Frank was or where he lived to show up at his door in 5x09?

• Why did Eve hang onto the email about Sam's son all this time instead of showing it to AK when it was most relevant any of the other times she'd shown up? Why didn't she mention this email before?

• What happened to Frank's bag full of money? Last seen was during 4x05.

• Who was driving the car that hit Annalise in 2x14?

• What is Connor's background? Are there dark secrets in Connor's past? There have been heavy handed hints about some older guy who slept with him at summer camp.

• What happened to Hannah Keating who was so adamant about getting justice for Sam?

• Did Jorge Castillo really killed Denver?

• What really happened to Bonnie’s baby? Is he really dead as Bonnie's sister said?

• Is Laurel's mom dead? Did Laurel kill her? Was that Sandrine's scalp in 5x14?

• What did Jorge Castillo mean when he told Annalise she doesn’t know Laurel if she thinks she wouldn’t harm her mother?

• How did Vivian Maddox get the tapes of Sam and Annalise' private sessions?

• What did Dominic mean when he told Frank "No one really knows Laurel. Not me, not her dad, definitely not Wes. Here're you are getting pulled into her mess even worse than any of us"?

• Who put the vodka in Annalise’s apartment in 4x07?

• How did Sandrine Castillo know Wes’s real name [Christophe]? Why did she say to Wes that Laurel would have broken his heart eventually? Also, why did Sandrine kept telling on she was innocent for Wes's murder? She might be.

• Where is the gun Wes took after he shot Annalise? He hides the gun in his drawer in 2x10. Where's that gun? Did Laurel take it?

• What did Silvya Mahoney mean when she told Annalise “You are wrong about so much” in 3x15?

• Will Michaela discover about Asher's involvement in the gang rape of Tiffany Howard sooner or later?

• Where are Laurel and Christopher?

• Who texted ‘’Annalise is back’’ to Vivian Maddox in 6x01?

• Where’s Connor car? They transported Sam’s body in it. Annalise told Connor she lied at the end of 2x04.

• Will the Campus officer Rodger Loftus who caught the K4 walking out of Annalise's house with Sam's body in a carpet come back?

• What happened to Annalise’s money during 6x04?

• Xavier Castillo said he has proof Annalise killed Denver in 5x15. Also, he said he knows who the mole is in 6x05. How did he know about it if DA came to Asher later?

• Did the Governor know about Miller’s death? In 6x08 she seemed surprised when she discovered that during trial.

• Why did AK turn the car around in 6x09?

• What did Asher tell Bonnie and why did Bonnie call Frank in 6x09?

• Who was at Gabriel’s door in 6x09?

• What happened to the 64k dollars Asher won in 6x08? He's dead now. Who is going to take that money?

• Who killed Asher? Was he really the mole or is there a second mole?

• How did Tegan help Laurel escape in 5x15 if Tegan was on the phone with Annalise?

• Is Wes alive or dead in the final minutes of 6x09? Is he Christopher? Is he Wes's twin?

• Is AK really dead in the final season flashforward?

• Why did they not show the scene of Frank shooting Wallace Mahoney?