The Montgomery's were going through A LOT of family drama in Season 2, which only got worse when Ezria opened up about his relationship with Aria. He then quit teaching at school to move to Hollis, where his crazy ex-fiancée appeared and blackmailed Aria and forcing her to dump Ezra! Poor Aria REALLY couldn't catch a break...
As if maybe moving to Texas wasn't bad enough, Emily was also slowly being poisoned by A at the start of Season 2! This led to Emily spending some time in hospital with a nasty hole in her stomach (as Hanna kept reminding us...). Then 'A' threatened Emily, forcing her to screw up her relationship with Samara. Oh, and then Emily had a huge fight with the girls - bad times!
In Season 2 Hanna went through it all: awkward double dates, stepsister drama, her dad getting remarried, nearly being drowned. Plus Caleb lied to her about helping the other Liars track down 'A' and then got himself arrested! But Hanna got through it all like the badass goddess she is!
Between her parents trying to stop Spence from seeing Toby, finding out Ian was the father of Melissa's baby and that Ian was not in fact dead (but then was), Spencer had a pretty rough time of it. She didn't help matters when she pawned Melissa's ring to buy back Toby's truck. She then broke up with Toby and was briefly kidnapped by Mona, aka 'A'.