This week, the nurses are on strike and one of the interns joins them; Izzie reveals a shocking secret from her past; Meredith is maybe onto Richard and Ellis; Burke and Cristina still want different things out of their relationship; a new resident shakes things up; and Derek is actually a good...

This week, Meredith and Cristina each find out where the other stands in their respective relationships and do some meddling; George gives an ultimatum that he ultimately takes back; the nurses are fed up; Alex finally finds out the results of his retest; and someone hates the only Best Monologue...