Peripeteia and Zero hour

Peripeteia noun - A sudden and unexpected change of fortune or reverse of circumstances (especially in a literary work).

Zero hour and peripeteia are semantically related. in critical juncture topic. In some cases you can use "Zero hour" instead a noun "Peripeteia".

Zero hour noun - A time or state of affairs requiring prompt or decisive action.

Peripeteia and zero hour are semantically related. Sometimes you can use "Peripeteia" instead a noun phrase "Zero hour".