Michael Ausiello
August 20, 2010 AT 06:56 PM EDT

Image Credit: Jordan Strauss/Getty Images; Inset: FoxIt’s a Grey’s Anatomy/House crossover…in the absolute loosest sense of the word!

Ex-Rescue Me and Numb3rs star (and current AssCastles host) Diane Farr will guest in an October episode of Grey’s Anatomy as a patient with Huntington’s disease—the same ailment that Olivia Wilde’s Thirteen is living with on House.

I warned you it was a loose connection. (Cut me some slack; it’s a summer Friday.)

Farr’s character will be under the care of Meredith (Ellen Pompeo) and is slated to appear in this season’s fourth episode.

Grey’s Anatomy returns on Sept. 23.

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