Rhomeyn Johnson

After a successful operation on his heart, George's father undergoes surgery for his cancer, Thatcher Grey visits Seattle Grace in order to see his new granddaughter, and Meredith discovers that Derek has trouble sleeping soundly. This is Part One of a two-part episode.

Marshall learns Lily's dirty little financial secret when he and she decide to buy an apartment.

The boys unleash pandemonium during a visit to the zoo; Francis and Piama befriend a German couple (guest stars Kenneth Mars, Meagan Fay) looking for a young man with a strong back to work on their dude ranch.

After NCIS arrives at a Halloween crime scene, Torres recognizes the victim as a friend from federal law enforcement training; Jimmy thinks his lab is haunted by ghosts after objects keep mysteriously moving.