Since Thirteen's departure on House, Princeton-Plainsboro has been a revolving door for the female doctors trying to fill the void. Now the team has found a keeper — and she's not even a doctor.

Jennifer Grey's House call

Meet hyperintelligent, third-year med student Martha Masters (played by guest star Amber Tamblyn). Despite her age and lack of experience, Cuddy forces House and the team to give Martha a chance, but her morals clash big time with House's style.

"She is incredibly brilliant, but sometimes she can be very socially awkward," says Tamblyn. "She's almost like a younger version of [House], only she believes in the ethics of truth-telling to a fault, just in a same way that he believes in lying to help you find the truth to a fault."

After House [Hugh Laurie] comes to the conclusion that Martha is the, "the love child of Einstein and Mary Poppins," the irritated doc fires Martha a handful of times, but begins to realize her genius can help the team — no matter how by the book she is.