Nancy Dean Liebhart is a one time character who travels with the MJN Air crew in the episode "Qikiqtarjuarq" She is a nature trip organiser from Unbeaten Track Travel who hires the crew to take passengers to Qikiqtarjuarq on behalf of her firm.
She is dismissive about MJN Air's company and crew and demands at one point that the crew only refer to the flight as a Unbeaten Track flight which backfires on her after Douglas accidentally terrifies the passengers.