Air date: March 20, 1938 The Shadow unmasks the sinister White Legion, a vigilante organization led by prominent city officials who are behind a wave of abductions and a vast political corruption scheme.Notes: This is the end of the "first season" of The Shadow, although the show picked up with a "summer series" the very next week. It was also the end of Agnes Moorehead's first run as Margo Lane, although she returned when "Season Two" started in September.