When Andy booked the current incarnation of his old a cappella group from Cornell University to perform at "The Office" Halloween party, he was expecting they'd treat him like a legend. Instead, they seemed to barely acknowledge he was an alum of their school, much less their group. But a lot of that blame can be laid directly at the feet of Broccoli Rob, played by Stephen Colbert.

Rob and Andy had been in the group together, but Rob still lives nearby. And as we learned later in the episode, he was up there three times a week bending the ears of the guys. In doing so, he took the credit for basically all of Andy's Cornell achievements.

It culminated in an awkward encounter after Erin had convinced the group to throw Andy a bone and perform his signature song, George Michael's "Faith." Andy was even dressed up as George Michael, having secretly hoped they'd perform it and ask him to solo. But Rob had told them it was his signature song, so he showed up on the monitor to steal Andy's solo.

It was a fun reunion of the two former "The Daily Show" correspondents, though a bit disappointing that they never came never face-to-face. Perhaps Colbert can squeeze in a more substantial guest spot before the series wraps so he and Andy can address their feud more directly. And, just for fun, maybe he could bring Jon Stewart along as well.

The final season of "The Office" rolls on, Thursdays at 9 p.m. ET on NBC.

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  • Fat Betty, "Mad Men"

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  • Hibernating Max, "Happy Endings"

    <strong>What You'll Need: </strong>A bucket and/or a furry hat for your head, Wayfarers, a beard, a willingness to go shirtless (or don long underwear), an ability to grunt in a dazed and confused manner, a jar of honey. <strong>Optional Accessories:</strong> A unicycle and a trash can to root around in.

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    <strong>What you'll need</strong>: Giant, red toy lips, short black wig, pajamas, harem of friends to act as your bickering offspring. <strong>Optional accessories</strong>: Pack of q-tips to use to swab your daughters' cheeks for DNA.

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    <strong>What You'll Need:</strong> Several friends to gallop around with and a <a href="http://www.fredflare.com/APARTMENT/Horse-Head-Mask/">creepily realistic horse mask</a> for each person <strong>Optional Accessories: </strong>A Dustin Hoffman gangster-type, horse trainers with unintelligible accents, someone with a PETA-stamped "Save The Horses" picket sign

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  • Purrfect, "The Voice"

    <strong>What You'll Need:</strong> White pants, cat years and a t-shirt with Cee Lo's face on it <strong>Optional Accessories:</strong> A sign that reads: "CAT FOR HIRE," Someone dressed like a pink cockatoo, Someone dressed like Cee Lo (with necessary sunglasses)

  • Sister Jude, "American Horror Story: Asylum"

    <strong>What You'll Need:</strong> A nun's habit, a <a href="http://www.spencersonline.com/product/al-riding-crop-black/">riding crop</a> and a good scowl. <strong>Optional Accessory: </strong>An Emmy award.

  • Dr. Rizzo, "Animal Practice"

    <strong>What You'll Need:</strong> A stethoscope, lab coat, fangs and black nail polish. <strong>Optional Accessories:</strong> Excessive facial/body hair, a banana, an actual doctor to perch on the shoulder of.

  • One-Night Stand Doctor, "The Mindy Project"

    <strong>What You'll Need: </strong>A sequined short dress (ideally in a jewel tone), a white doctor's coat and a stethoscope <strong>Optional Accessories:</strong> A doctor's bag with some stilettos and a condom, A male nurse with some messy hair

  • Ron Swanson At A BBQ, "Parks & Recreation"

    <strong>What you'll need:</strong> Fake mustache, masculine-themed cooking apron, meat smoker attached to your car, toy pig. <strong>Optional accessory:</strong> Bacon to hand out to trick-or-treaters.

  • The Dowager Countess, "Downton Abbey"

    <strong>What You'll Need: </strong>A hat, cane, corset, floor-length gown and stern expression. <strong>Optional Accessories:</strong> Maids, a cup of tea.