The Mentalist 3.20 is called 'Redacted' (not 'In The Red' as previously reported). It will be written by Eoghan Mahoney.
3.21 will be written by Jordan Harper who has tweeted that he's getting ready to start pre-production on this episode. He says he's really excited about this one and there's a 'cool casting spoiler'. Details should be out during the next week.