Something I came up with the other day that’s too hard and convoluted for anything but a blog post:

Take the protagonist of a well-known play.  Add the letter ‘I’ to the protagonist’s name and rearrange the letters, and you’ll get the name of one of the play’s female leads.  Add the letters ‘LOM’ to the protagonist’s name and rearrange the letters, and you’ll get the name of the play’s villain.

What’s the play?