1) Ancient Greek theatre 
Anagnorisis (s; ἀναγνώρισις) is a moment in a play or other work when a character makes a critical discovery. Anagnorisis originally meant recognition in its Greek context, not only of a person but also of what that person stood for. Anagnorisis was the hero`s sudden awareness of a real situation, the realisation of things as they sto....
recognition leading to denouement of a play
• (n.) The unfolding or denouement.
(Greek: `recognition`), in a literary work, the startling discovery that produces a change from ignorance to knowledge. It is discussed by Aristotle ... [1 related articles]
(Greek for 'recognition')
An`ag·nor'i·sis noun [ Latinized from Greek ...; ... + ... to recognize.] The unfolding or dénouement. [ R.] De Quincey. 
variously translated as 'discovery' or 'recognition'; an important element of tragedy according to Aristotle's Poetics whereby a tragic protagonist gains information previously unknown leading to important insight.
(in ancient Greek tragedy) the critical moment of recognition or discovery, esp. preceding peripeteia.
a scene of recognition or discovery.