The Ellen DeGeneres Show (3-4 p.m., NBC10) - Actor Chris Rock; actress Elizabeth Banks (W.). The Mentalist (9-10 p.m., CBS3) - In this new episode, a girl becomes the prime suspect in the slaying of her best friend when she's found covered in blood and holding the murder weapon. But she has no memory of the crime, and Patrick (Simon Baker) has reason to believe she's innocent.