Pretty Little Liars 2x13 The First Secret Season 2 Season 0 0 EpisodesSeason 1 22 EpisodesSeason 2 25 EpisodesSeason 3 24 EpisodesSeason 4 24 EpisodesSeason 5 26 EpisodesSeason 6 20 EpisodesSeason 7 20 Episodes 2x1 - It's Alive 2x2 - The Goodbye Look 2x3 - My Name Is Trouble 2x4 - Blind Dates 2x5 - The Devil You Know 2x6 - Never Letting Go 2x7 - Surface Tension 2x8 - Save The Date 2x9 - Picture This 2x10 - Touched by an 'A'-ngel 2x11 - I Must Confess 2x12 - Over My Dead Body 2x13 - The First Secret 2x14 - Through Many Dangers, Toils and Snares 2x15 - A Hot Piece of 'A' 2x16 - Let the Water Hold Me Down 2x17 - Blond Leading the Blind 2x18 - A Kiss Before Lying 2x19 - The Naked Truth 2x20 - CTRL: A 2x21 - Breaking The Code 2x22 - Father Knows Best 2x23 - Eye of the Beholder 2x24 - If These Dolls Could Talk 2x25 - UnmAsked It's the Halloween before Alison disappeared and where all of the secrets and lies began for Aria, Emily, Hanna and Spencer.