Fall TV Preview

Stephen Colbert to Stir Up Treble on The Office

The Office Stephen ColbertEd Helms will reunite with a former Daily Show cohort this fall when Stephen Colbert guest-stars on The Office.

TVLine has confirmed that the Colbert Report host will drop by the NBC comedy’s ninth and final Halloween-themed installment as the oft-mentioned but never-before-seen Broccoli Rob. EW.com first reported the casting news.

RELATED | Exclusive Office Video: Look Back at 8 Seasons of Dunder Mifflin Fun – Michael Scott Included!

A onetime member of Andy’s Cornell a cappella group Here Comes Treble, Rob (finally) makes his debut in the Oct. 25 episode after the Dunder Mifflin boss gets wind that his frenemy is rewriting their musical history in a much-too-dissonant key.

Colbert and Helms, along with ex-Office star Steve Carell, worked together on Comedy Central’s The Daily Show from 2002-2005.

The Office, meanwhile, kicks off its farewell season tonight at 9/8c.