Pretty Little Liars Season 1 Episode 3 : To Kill a Mocking Girl

The girls try to pay tribute to Alison's memory, but they are still faced with unresolved issues. Aria has an unpleasant encounter with her father's former mistress. Spencer faces a vengeful Melissa after her kiss with Wren. Hanna tries to get Sean to forget the 'old Hanna'. The girls realize that leaving the past behind is much harder than they first thought.