Emily Prentiss:  So Hotch is even more intense now that Gideon 's gone .
Dr. Spencer Reid: Yeah , I 've noticed .
Emily Prentiss: Do you think that 's gon na change ?
Dr. Spencer Reid: I certainly think we 'll find out .
Emily Prentiss: What about you ? You okay ?
Dr. Spencer Reid: Oh , I'm- I 'm great .
Emily Prentiss: Do you want to talk about it ?
Dr. Spencer Reid: What 's there to talk about , really ?
Emily Prentiss: Gideon .
Dr. Spencer Reid: Oh , no . He , uh- he left a letter explaining everything . Just like my dad did when he abandoned me and my mom .
Emily Prentiss: He addressed it to you .
Dr. Spencer Reid: Yeah , yeah . You know , Gideon stood toe to toe with some of the ... the sickest people on this planet . I think that took a lot of courage , right ?
Emily Prentiss: Yeah .
Dr. Spencer Reid: So , why 'd he do this ? It 's addressed to me , but I'm- I 'm not- I 'm not the only one that he abandoned .
Emily Prentiss: But why is it addressed to you ? I think you need to read that letter again .
Dr. Spencer Reid: I have an eidetic memory , Emily .
Emily Prentiss: Ah , yeah , I know , and an IQ of _ 187 _ , but what do you remember about your father ?
Dr. Spencer Reid: What do you mean ?
Emily Prentiss: Well , he gave you ten years before he left , and yet you 've erased all those memories . And it 's too painful , I get it . But then Gideon leaves . I think you need to read that letter again , and ask yourself why , of all the people he walked away from , did he only explain himself to one person : you .