Adventure Time Season 6 Episode 30 The Diary Episode Title:The Diary.Episode Description:Jake's son T.V. (voiced by Dan Mintz) finds an old diary, which revives a decades-old mystery surrounding the writer of the book. T.V. soon pours over the scrawling of the writer, whose initials are B.P. (voiced by Alia Shawkat). The more and more T.V. reads, however, the more obsessive he becomes, to the point where he soon begins to experience everything that the diary's author wrote about. Eventually, with the help of Jake, T.V. is able to discover that the diary belonged to Nurse Poundcake (voiced by Little) when she was younger.