German cinema continues to be saluted Wednesdays on TCM this month, and tonight the lineup begins with a rare, long German film I don’t think has ever being televised in the U.S. prior to tonight: 1922’s Dr. Mabuse (pictured), director Fritz Lang’s mammoth movie divided into two 2.5-hour chunks, The Gambler and Inferno. Rudolf Klein-Rogge stars in the title role. And after the two 1922 films comes a sequel (at 12:45 a.m. ET), filmed 11 years later, with the same director, star and subject: 1933’s The Testament of Dr. Mabuse. Also shown tonight are two more frequently televised German classics, also directed by Fritz Lang: 1926’s Metropolis (at 3 a.m. ET), a silent sci-fi classic, and (at 5:45 a.m. ET) 1931’s M, the creepy child-murderer character study that made a star of Peter Lorre.