Sunday June 15 8:30pm (M) on Seven

On Part 1 of the Season Finale of GREY’S ANATOMY, Meredith and Derek work on their last patient in the clinical trial as the other surgeons desperately try 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.

AMY MADIGAN GUEST STARS

GREY’S ANATOMY stars ELLEN POMPEO as Meredith Grey, PATRICK DEMPSEY as Derek Shepherd, SANDRA OH as Cristina Yang, KATHERINE HEIGL as Isobel “Izzie” Stevens, JUSTIN CHAMBERS as Alex Karev, T.R. KNIGHT as George O’Malley, CHANDRA WILSON as Miranda Bailey, JAMES PICKENS, Jr. as Richard Webber, SARA RAMIREZ as Callie Torres, ERIC DANE as Mark Sloan, CHYLER LEIGH as Lexie Grey and BROOKE SMITH as Erica Hahn, with special guest AMY MADIGAN as Dr Wyatt.