In the episode ' Jermaine,' Finn and Jake are inspired to go visit Jermaine after Jake encounters Jermaine in another shared dream. This makes him and Jake half-brothers due to only sharing Joshua as their biological father. Jermaine's birth is depicted in ' Joshua and Margaret Investigations.' He is revealed to be the only biological child of Joshua and Margaret, as Jake was the result of Joshua being infected with the DNA of a shapeshifting alien and creating a dog/alien hybrid, while Finn was adopted. Joshua briefly mentions Jermaine in a videotape in ' The Pit' when telling his children where he has gone searching for Kee-Oth the Blood Demon. Jermaine explains that they are able to talk in this manner because they are both dreaming at the same time (though Jake does not appear to be dreaming or otherwise affected by hitting his head).Ī photo of Jermaine, alongside Joshua and Jake, is seen in Finn's memory in ' Memory of a Memory.' In ' Jake the Dad,' a hologram of his younger self is seen in Mom's manual with Finn and Jake.

Jake hurt Jermaine in the flashback, which seems to have left an impact on Jake causing him to avoid violence as a way of solving problems.Īfter Jake hits his head and apparently begins a spiritual communication later in the episode, Jermaine tells him that he understands Jake did not mean to hurt him. He is introduced in ' Crystals Have Power' in one of Jake's flashbacks where they were both children. Tom Scharpling (' Jermaine'-present) Jermaine is Jake's younger half-brother, the adoptive older brother of Finn, and the son of Joshua and Margaret.

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