Monroe's family is about to get a little bigger on Grimm.

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The Blutblad's uncle is coming to town, according to TV Line, and Felix Dietrich will come bearing gifts. Thanks to the German bookseller, Nick (David Giuntoli) may soon be able to recoup his losses in the wake of Juliette's (Bitsie Tulloch) little arson attack.

"In the course of his work as an antiquarian bookseller, Felix will come across some very old volumes about Grimms...then find himself followed by those who are willing to kill in order to secure the books," TV Line announced on Thursday.

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Described as "bespectacled, bookish [and] slightly off-center" (the apple doesn't fall far from the tree, does it?), Felix will flee to the US seeking his nephew's protection. Interestingly enough, Mr. Dietrich will make his debut in the tantalizingly titled tenth episode, "Map of the Seven Knights."

Will Felix's books have answers regarding the Seven Keys? The series is gearing up to close out the long-running storyline, and perhaps the highly sought after tomes will shed a little light on the whereabouts of key number seven.

Find out more when Grimm returns to NBC on Oct. 30 at 10 p.m. ET.

Tags: Grimm television nbc