Karla Droege

As news of Seattle Grace's financial issues spreads, Catherine wants Jackson to move to Boston and the interns fear for their jobs; the doctors try to save the hospital by meeting with a possible investor; Jo is impressed with Alex.

In the season four premiere, the girls turn to Mona for answers, now that she is also being targeted by "A." Plus, the contents of the trunk are revealed.

Who killed Toby's mother? Who hit Alison in the head with the rock the night she went missing? Who is Red Coat? Who killed Bethany? Who is the Black Widow? Why has "A" been targeting the PLLs all this time? After years of torture and endless questions, Alison, Aria, Emily, Hanna and Spencer finally come face to face with their tormentor and learn the story of how and why Charles became "A."

When a man next to House on a flight from Singapore to the United States becomes violently ill, Cuddy suspects he has a contagious virus.

When a 16-year-old girl is murdered and left in a cage, Jane and Maura must overcome the ethical dilemma of a psychiatrist and the stiff opposition of a fussy prosecutor in order to find the killer. Meanwhile, Jane has couch issues, and Frankie is seeing UFOs.