We can't believe it when Izzie returns to Seattle Grace, not to ask for her job back, or to hash things out with Alex, but to get a diagnosis for her high school teacher, who is suffering from dementia. She bullies Charles into doing a series of tests, including a spinal tap, telling him, "You got me fired. You owe me this, bitch." The teacher's illness ends up being treatable, but he can't afford the $10,000 surgery. Izzie marches into Richard's office and demands that he do the surgery pro bono, or she'll go to the press about how she gave the hospital $8 million for the clinic.
Of course, we're really dying to know: What will Alex say when he sees Izzie? We're shocked when he pretends he hasn't even seen her! When he finally confronts her, we can see that any reconciliation is a long way off. Izzie tells him, "You went behind my back and told the chief I wasn't ready to be here. You got me fired." She says, "I cannot forgive you for this." We can't blame him that he's furious about her disappearing act: "I am your husband and you didn't give me the benefit off the doubt, so you know what, I can't forgive you either."