Second letters of this puzzle's five theme answers (seen in order)

Question:

Answer:

AEIOU

Length:

Similar Crossword Questions:

The pairs of letters inserted into each of this puzzle's theme answers, for example
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Letters for the names "buried" in this puzzle's theme answers
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Where one might see the sounds embedded in this puzzle's theme answers
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Feature of this puzzle's theme answers?
Element of surprise in this puzzle's theme answers
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What one gets by multiplying the numbers in this puzzle's theme answers
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Records "broken" in this puzzle's nine theme answers
Comic that comes to an end on October 3rd, and whose catchphrase ends this puzzle's theme answers
Letters featured in this puzzle's theme
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