What does "the deed is done, the doers undone" in a headline mean?

Solution 1:

No, the headline does not refer to the thespian abilities of the actors. Ben Bradley gave a favourable review to the play.

"The deed is done, the doers undone " alludes to the story of Macbeth; that both Macbeth and Lady Macbeth plotted and committed murders (the deed is done), and subsequently became mentally tormented by their evil deeds (the doers undone).

Besides alluding to the play in his headline, Bradley also brings other references from the play in his review. For example,

This “Macbeth” banks the sound and fury that lies within the play and its title character.

The above is a direct reference to the famous verse from Macbeth:

Out, out, brief candle! Life's but a walking shadow, a poor player that struts and frets his hour upon the stage and then is heard no more: it is a tale told by an idiot, full of sound and fury, signifying nothing.

Solution 2:

It's a reference to lines in the play Macbeth, in which "the deed" refers to Macbeth's murder of the king, Duncan.

The three witches in the opening scene mention that they will meet again "after the deed is done."

Later, after prodding by his wife, Macbeth does murder Duncan and emerges from the chamber saying:

I have done the deed. Didst thou not hear a noise?

As for "the doers undone" ... here is a spoiler alert. Don't read on if you intend to see the play and don't know the ending.

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[Macbeth and Lady Macbeth pay for their crimes in the harshest possible manner.]