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Exclusive Up All Night Video: Maya Rudolph + Sean Hayes + Halloween = One Scary Idea!

To quote Christina Applegate’s Up All Night leading lady, “Two people who know nothing about human children” should never be put in charge of the neighborhood’s haunted house. That is, however, exactly what happens in this Thursday’s Halloween-centric episode of the NBC comedy (8:30/7:30c), when Ava (Maya Rudolph) and Walter (Sean Hayes) try their hand at horror.

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Watch our exclusive first look below, in which the ex-TV host and her ex-accompanist scar kids — and Will Arnett’s Chris! — for life, and then hit the comments with your thoughts on the spook-filled installment.