W hen money gets tight, as it certainly is in Hollywood at the moment, industries default to dependable formulas. Which is probably why we’ve seen so many new shows set in emergency rooms. Reuniting producers of ur-ER drama ER with one of its stars, Noah Wyle, Max’s The Pitt , whose debut season unfolds in real time over a single shift, is the best and buzziest of the bunch. NBC sitcom St. Denis Medical gives emergency medicine the mockumentary treatment. Apple has a dry, German-language take