Nothing's spookier than Halloween at Dunder Mifflin ...

Every sitcom has, at one point or another, dedicated a few episodes of its seasons to the holidays. For instance, Friends is known for its Thanksgiving-themed episodes, while How I Met Your Mother created running jokes with its Halloween-centric episodes. Throughout its nine-season run, The Office aired six Halloween episodes.

As with other holiday-themed episodes, these Halloween-themed episodes of The Office have some tricks and some treats. So, we've gone ahead and created a definitive ranking of the best Halloween episodes of The Office. Enjoy!

*Please note that the following episodes of The Office are listed in descending order.

No. 6: "Here Comes Treble" (Season 9, Episode 5)

When Andy invites his Cornell a cappella group to perform at the office's Halloween party, things don't go as planned. Meanwhile, Pam is angry with Jim about his investment in a sports marketing company. Though, I guess I could've ranked this one higher just for the classic moment of Dwight getting a pumpkin stuck on his head ... talk about a GIF-able moment! But honestly, I'm not much of a fan of this season (or the previous one), mostly due to the lack of Michael Scott shenanigans.

No. 5: "Employee Transfer" (Season 5, Episode 5)

There are not many Halloween moments in this one, outside of Creed, Kevin, and Dwight dressing up as the Joker from The Dark Knight and Pam being the only one in costume at the corporate office. The episode's main focus is on Michael and Holly, who go their separate ways after ending their romantic fling.

No. 4: "Spooked" (Season 8, Episode 5)

Again, without Michael, nothing is the same. In this episode, Erin is tasked with setting up the Halloween party, Jim and Pam argue whether or not ghosts are real, and Robert California swings by the office. Also, how could we forget Dwight dressing up as Sarah Kerrigan from StarCraft? 

No. 3: "Koi Pond" (Season 6, Episode 8)

This episode's opening scene shows how out of touch Micahel is when the Dunder Mifflin crew hosts a haunted house in the warehouse, and he, well, tries to teach the kids an important lesson... (Watch the deleted scene.) We also get Jim's iconic "Bookface" costume, and then Darryl acts as the guide as he comes across employees in costume—and he could never quite guess what they were. He was always comically close, though! Oh, and Michael falls into a koi pond.

No. 2: "Costume Contest" (Season 7, Episode 6)

Everyone gets super competitive when the office has a Halloween costume contest. The prize? A Scranton-area coupon book (that everyone thinks is worth $15,000). This episode is worth watching for the costume changes alone (but mainly to see Jim and Cece dressed as Popeye and Swee'Pea at the end).

No. 1: "Halloween" (Season 2, Episode 5)

Nothing beats the sheer brilliance of this Halloween episode. Michael waits until the last day of the month to fire one of his employees; of course, the last day falls on Halloween. Again, the chaos that ensues in this episode alone is amazing to watch. The costumes aren't half bad, either.