Paul Norwood

The interns face what could be their biggest challenge yet when they deal with the fallout of a major disaster; Alex fights to save the life of a pregnant woman; Izzie helps a man pinned beneath a car.

Meredith's friends and fellow doctors work to save her life after her near-drowning; Izzie gathers her courage to perform surgery at the site of the ferry accident.

The team think that two people might be working together to commit a series of murders, taking leads from DVD footage of each crime provided by the families of the victims.

With Halloween approaching, Susan must reveal her secret internet side job to Mike; Juanita grows suspicious of Gabrielle's sudden interest in Grace; Bree learns a secret about Keith.

The person most betrayed by Emily becomes the only person who can help her as the blackouts turn increasingly violent. Victoria makes a drastic move as she attempts to deal with a figure from her past.