John O'Brien

Chandler and Monica leave for their honeymoon as Rachel prepares to tell Ross he's the father of her baby. Monica and Chandler become jealous of another honeymooning couple who get bumped to first class on the plane.

Adam Mayfair is shocked when a mysterious stalker from his past shows up on Wisteria Lane, Bree and Orson encounter marital problems with a new baby in their lives, and Lynette reunites with her long-lost stepfather.

More positive changes are made by the hospital's new management; Meredith worries about her unborn baby; Alex decides to give Jo's boyfriend a run for his money.

Jonah is assigned to the gun section of Cloud 9 and refuses to sell to anyone he deems suspicious. Glenn tries to buy the store's entire stock of morning-after pills.

The residents of Seattle Grace and Mercy West fight for surgeries as day one of the hospital merger begins.

Some very deep secrets are made painfully public when Meredith's mother, who suffers from Alzheimer's disease, is brought to Seattle Grace for a surgical procedure. Meanwhile, some frightening news about Cristina's health is brought out into the open.