A stator vane for a gas turbine engine having a cooling circuit that passes through the airfoil and both of the inner and the outer diameter endwalls to provide cooling for the airfoil and endwalls. Each endwall includes an intricate cooling circuit and is connected to the serpentine flow circuit within the airfoil to pass cooling air back and fourth from one endwall to the other through one of the legs in the serpentine flow circuit of the airfoil. A row of exit cooling holes is located in one or both of the endwalls and is connected to the last leg of the serpentine circuit to discharge cooling air. The airfoil and endwalls cooling circuit forms a series of passages that meander through the vane before discharging out through the exit holes.