The spookiest day of the year is here, and several shows have already aired their very special Halloween episode pictures. Over the years, we've seen some pretty memorable Halloween-themed episodes, especially on shows that have paid homage to the holiday every year, like How I Met Your Mother, The Office, and Parks and Recreation. Take a trip down memory lane to see some of our favorite characters in costumes from this year and years past.
Celebrate Halloween With Over 100 TV Characters in Costume
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