Question

The "point of no return" in the play is the _____.

Answer 1

The "point of no return" in the play is the crisis. 
After crisis begins in a play, you cannot return to the previous state, to the state which was before the crisis began. Denouement refers to the conclusion of a story. Complication is where the problem of a play begins. Exposition is the very beginning of a play. 

Answer 2

SOS:

The answer is crisis!!

Hope this helps!