John O'Brien

Everyone seems to know who the father of Rachel's unborn baby is except for the man himself: Ross. When he finds out, he is more concerned with other matters than his relationship with Rachel. Meanwhile, Phoebe and Joey fib about a gas leak to gain entry to Monica and Chandler's apartment.

After taking a loan from Evelyn, Alan is guilted into double-dating with her, her new romantic interest and his daughter.

Cristina's encounter with a former nurse, now a patient at Seattle Grace, changes her forever; Derek and Meredith treat a construction worker who has miraculously survived an injury but is now faced with tough decisions about his future; and a patient recognizes Izzie from a lingerie ad, which makes her the subject of hospital gossip.

With Spencer’s mom, Veronica Hastings (recurring guest star Lesley Fera), now taking Garrett (recurring guest star Yani Gellman) on as a client, Spencer is sure that there is a reason forcing her mother to take on the case. But when she starts questioning, she doesn’t so much learn why her mother took the case as she stumbles upon a larger Hastings secret. Emily also gets some surprising news about her English exam and fears what those consequences could hold. Meanwhile, Aria agrees to be Jenna’s (recurring guest star Tammin Sursok) accompanist in order to keep tabs on her, and Hanna tries to reach out to Lucas (recurring guest star Brendan Robinson).

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.