Here's the official guide of The Mentalist season 5 episode 22 "Red John's Rules". This episode airs on Sunday, May 5 on CBS.
RED JOHN STRIKES AGAIN, AND THE VICTIM HAS A LINK TO JANE’S PAST ON THE FIFTH SEASON CLIFFHANGER FINALE --
Laura San Giacomo Guest Stars as Social Worker Miriam Gottlieb
- Just as Jane narrows down the Red John suspect list to seven, Red John strikes at a victim with links to Jane’s past.