1) Peripeteia 2) Peripetia 3) Surprise 1) Peripeteia 2) Peripetia 
Another term for peripeteia. See above. The word was particularly common in older English writing.
See turning-point.
peripeteia, peripetia, peripety A sudden and unexpected change of fortune or events or reversal of circumstances; especially, in a literary work.
(Gr. peripeteia) A sudden reversal of condition or fortunes, considered by Aristotle as an essential element in the plot of a tragedy. -- G.R.M.