Give some stream of consciousness and then the answer. "The Farm" is the seventeenth episode of the ninth season of the American comedy television series The Office and the 192nd overall. It originally aired on NBC on March 14, 2013. The episode guest stars Matt Jones as Dwight's cousin Zeke, Majandra Delfino as Dwight's sister Fannie, Blake Garrett Rosenthal as his nephew, and Thomas Middleditch as his brother.

Based on this passage, who plays dwight's brother on the office?
The relevant sentence in the passage is: The episode guest stars Matt Jones as Dwight's cousin Zeke, Majandra Delfino as Dwight's sister Fannie, Blake Garrett Rosenthal as his nephew, and Thomas Middleditch as his brother.
Therefore, the answer is Thomas Middleditch.