Gary Halvorson and Alejandro Amenábar, have which occupation in common?
Gary Halvorson: Gary Halvorson is an American director of television shows, series and film. Alejandro Amenábar: Alejandro Fernando Amenábar Cantos (born March 31, 1972), commonly known as Alejandro Amenábar, is a Spanish and Chilean film director, screenwriter and composer.
i don't know