La clemenza di Tito
Begins with Annius telling Sextus that Emperor Titus is in fact alive and has just been seen.  In the smoke and chaos, Sextus thought he has seen Titus, but it was someone else. Soon Publius arrives to arrest Sextus, bringing the news that it was one of Sextus’ friends who dressed himself in Titus's robes and was stabbed by Sextus, but he did not die.  The Senate take a court case against Sextus as Titus waits impatiently, sure that his friend will be found not guilty; but the Senate finds him guilty, and a terribly sad Titus must sign Sextus' death papers.