The first impression of The Knick, the new 10-part drama series that begins this weekend on Cinemax, is that it seems derivative. It's about a maverick doctor played by Clive Owen who's rude to almost everyone around him — like the abrasive hero of Hugh Laurie's Fox series, House. He works at a hospital in a big city, in the shadow of bigger hospitals, fighting for attention and respect — like the doctors on St. Elsewhere. The title The Knick, in fact, is short for Knickerbocker Hospital, and is as derisive a nickname as "St.