S01E09: 'Who's Zoomin' Who?'

An outbreak of a sexually transmitted disease affects several members of the hospital staff, prompting Chief Webber to call a meeting.

Meanwhile, the chief reluctantly confides in Derek about his own medical concerns.

Izzie and Cristina are worried by a patient's wife and daughter who are at odds over his care.

Burke treats Bill, a college buddy whose medical diagnosis raises some questions regarding his wife's actions.

And just as Meredith and Derek grow more intimate, a bombshell is dropped...