Possible Clues:

• When Petruchio meets Katherine
• Second part of "Cats"
• When Macbeth stabs Duncan
• When Hamlet declares “The play’s the thing”
• Second half of a play, often
• When "light through yonder window breaks" in "Romeo and Juliet"
• When Roxie's trial occurs in 'Chicago'
• ''Hamilton'' conclusion
• When Song's identity is revealed, in "M. Butterfly"
• Half of 'Rent'