Adventure Time Season 10 Episode 8 - The First Investigation Episode Title:The First Investigation.Episode Description:Kim Kil Whan sends Finn and Jake to Joshua and Margaret's old office after one of his employees is frightened by something. Finn and Jake see ghosts, and objects move around. Finn suddenly sees baby versions of himself, Jake and Jermaine, and gives Jake a wet willy; Jake had claimed that Finn gave him one years ago, but Finn denied it. Realizing that the ghosts are time remnants, Finn searches for the source; Jake accidentally frightens Kim's employee, and sees his own birth from "Joshua and Margaret Investigations". They discover that one of Dr. Gross' experiments, Time Bear, is responsible and Finn leaves a note for the past Joshua and Margaret. Jake meets his alien parent outside, turns blue and is taken away after leaving a note for Finn: "BRB-Jake".