Dexter Morgan:  I 'm meeting Deb for dinner . I 'll check in with you later .
Dr. Evelyn Vogel: Uh , wait . Just- There 's one thing I was wondering about since we last spoke ?
Dexter Morgan: Yes ?
Dr. Evelyn Vogel: When Harry and I came up with the Code , he insisted that you only kill bad people , and * I * insisted that the first rule of the Code be , " Do n't get caught , " giving you a little wiggle room .
Dexter Morgan: Okay .
Dr. Evelyn Vogel: So my question is this : when your sister found out about who you were and what you were doing ... why did n't you kill her ?
Dexter Morgan: What ?
Dr. Evelyn Vogel: Not that I would ever advocate such a thing , but since Debra knew the truth about you , she 's clearly a risk ...
Dexter Morgan: I would never kill Debra . She 's my sister . I love her .
Dr. Evelyn Vogel: What , exactly , do you love about her ?
Dexter Morgan: Wha- what do you mean ?
Dr. Evelyn Vogel: When a psychopath speaks about love , it does n't really mean the same thing as for ... typical people . So , what do you love about her ?
Dexter Morgan: I - I do n't know . I love having steaks and beer with her , and until recently , the fact that she ... is always there for me , the way she looked up to me .
Dr. Evelyn Vogel: But none of that is really about Debra . It 's about what she does for * you*.
Dexter Morgan: So you 're saying I 'm selfish ?
Dr. Evelyn Vogel: I 'm not criticising . Selfless love is hard enough for typical people . And for psychopaths , it 's ... impossible .
Dexter Morgan: So why are you telling me this ? So I 'll feel bad about myself ?
Dr. Evelyn Vogel: Quite the contrary . I want you to * revel * in what you are . I told you , you 're perfect .
Dexter Morgan: How can you still say that when you know what I 've done to Deb ?
Dr. Evelyn Vogel: That 's my point . You 're perfect as a psychopath . All this talk about helping Debra and ... loving her- it 's like you 're Michelangelo trying to play the banjo .
Dexter Morgan: I 'm trying to be good brother .
Dr. Evelyn Vogel: Why do n't you let * me * help Debra ?
Dexter Morgan: Because she would n't even listen to you . I 'm the only _ one _ that understands her .
Dr. Evelyn Vogel: Dexter , you 've admitted to being the cause for her pain . How can you expect to be the solution ?
Dexter Morgan: I can handle Deb . I 've been doing it my entire life .