Start with S1E1 "Pilot," keep a notebook handy, and trust no one. Especially if they offer you a ride in a black hoodie.

ALISON: (whispering) You have to hit me. SPENCER: Absolutely not. ALISON: It’s the only way she’ll believe I’m dead. The only way I can escape him. (Pause.) Do it, Spencer. Or I’ll tell everyone about the pills you stole from your mom. SOUND: A dull thud. A gasp. ALISON: Good girl. Now hide. And remember—you never saw me again.