This week's Pretty Little Liars saw Hanna being on the outside of the group as the girls worked with Caleb to decode more of 'A's cellphone.  All of them felt bad about keeping it a secret from Hanna (who knew something was going on), but finding out the information on the phone was crucial.  Caleb did manage to decode more of the videos and one of them revealed a fake ID of Alison's that none of the girls had seen before.  And one that strangely featured Alison in a dark wig.  When Hanna found out the truth, she was very upset with Emily, but the two made up by the end of the episode.  Hanna also revealsed a secret: she had seen Alison with dark hair before, years ago.  And a book she had borrowed from Alison yielded a clue: a claim ticket from a company that is still holding on to whatever Alison left there.  Spencer is on the trail!

Meanwhile, Kate joined Hanna at Rosewood High, which didn't thrill her at all.  Hanna continued to receive warnings from 'A" to get Caleb to stop looking into the cellphone.  Cornered, Hanna decided to tell Caleb the truth about her mother stealing the money from her customer and the fact that someone unknown is holding this information over her head.  But it looks like 'A' decided to get some revenge on Hanna regardless: someone used Hanna's phone to send a naked photo of Kate out to the school.

Hanna will have to face the repercussions of sending out this photo in the upcoming February 6 episode of Pretty Little Liars, even if she's not the one who did it.  The girls will be forced to participate in Rosewood's "Truth Day" (which is a lot better than Hanna getting expelled, to be honest).  Jason DiLaurentis also returns to the show and Spencer gets very suspicious about his interactions with her father.  Aria continues to be concerned about what Holden is doing while they're "out together", especially after seeing some wicked bruises on him in the last episode.

Watch a trailer and two sneak peeks below for the February 6 episode of Pretty Little Liars.