Another stellar, action -packed mythology two parter investigation begins on the K Files in Piper Maru! Similar to previous two part investigation Nisei and 731, Piper Maru was written by my mythology Einstein Chris Carter and his best mythos co-captain Frank Spotnitz, and directed by the best series action director, Rob Bowman. It introduces a key element of the alien threat in the black oil which would eventually play a much larger role in the series, including in the 1998 X-Files movie, Fight the Future.