According to TV Line, Prinze has signed on for one episode during "Bones'" ninth season, though there's potential for his character, an "armed and dangerous" CIA agent, to have a multi-episode arc.
"Buffy the Vampire Slayer" fans will remember that Boreanez played Gellar's longtime love interest, before he starred in the show's spinoff, "Angel."
Season 9 of "Bones" stars September 16.
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