Treisa Gary

Leonard is depressed to learn that Penny is dating someone. As a result, encouraged by his friends and fellow scientists, Leonard actually summons the nerve to ask a woman out on a date. SARA GILBERT ("Roseanne") guest stars as Leslie.

A young intern at California's state capitol is found dead at the bottom of a ravine. Evidence places the woman's stepbrother in the frame for murder, but Jane suspects that the crime was politically motivated. Elsewhere, Jane offers Bosco some words of warning about Red John.

When Berta swears vengeance on the married man who got her daughter, Naomi (recurring guest star Sara Rue), pregnant, she forces Charlie to come with her. Meanwhile, Naomi helps Berta with the housework. And Alan reveals an unusual fetish.