"GREY'S ANATOMY - ""Freedom"" - On the two-hour season finale of ""Grey's Anatomy,"" Meredith and Derek have one last shot at a successful outcome in their clinical trial, as the other surgeons work together to free a boy from a hardening block of cement. Meanwhile, Izzie helps Alex care for an ailing Rebecca, and Lexie discovers critical information about George's intern status, on ""Grey's Anatomy,"" THURSDAY, MAY 22 (9:00-11:00 p.m., ET) on the ABC Television Network. (ABC/RANDY HOLMES)ELLEN POMPEO, PATRICK DEMPSEY"
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