Which documentary that used 9 North was directed by Stephen Low?
9 North:  IMAX, National Geographic, and BBC film crews have made videos about the vents at 9 North, most noticeably "Volcanoes of the Deep Sea". Volcanoes of the Deep Sea: Volcanoes of the Deep Sea is a 2003 documentary film directed by Stephen Low in the IMAX format about undersea volcanoes.
Volcanoes of the Deep Sea