In 'Blue Bloods', which actor plays police commissioner Frank Reagan?

In 'Law & Order: SVU', which character does Mariska Hargitay play? In 'Law & Order: SVU', which actor played Elliot Stabler? In 'Chicago Fire', what is the firehouse number? In '9-1-1', in which city is the series primarily set? In 'The Good Doctor', what condition does Dr. Shaun Murphy have? In 'Scrubs', at which hospital do the doctors work? In 'House', at which teaching hospital does Dr. House work? In 'Grey's Anatomy', what is Meredith Grey's surgical specialty?