What the hell is wrong with you? He’s in love with you! Are you really that thick? <...> KILL IT! SHUT IT DOWN! LOCK HIM OUT! GIVE HIM NOTHING! You can string him along for years! You can spend years together and what do you do? You waste it. You never tell him that you love him. HE’S DEAD! HE’S DEAD! He’s just…dead. I never told him. Paul’s dead. And I’m alone. I’m all alone. I’m always alone!
(c) Dollhouse

one and only moment I really noticed Echo throughout the whole series.