Tonight's Grey's Anatomy, "Invest in Love," is all about how far parents will go to buy their child some more time, and how far Arizona Robbins will go to make that a reality.

Meanwhile, Cristina begins to test her boundaries with Owen, and Alex is losing it over Izzie vanishing, not to mention the left-over hospital bills that he must contend with.

For a primer on this evening's intense episode, follow these links to see the previews and pictures we've posted, along with Grey's Anatomy spoilers we've been compiling.

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