Marion Price

Captain Marion Price was a UNIT officer in the early 21st century. She served as second in command to Colonel Mace and was a senior technical officer. She was charged with co-ordinating between different countries such as the US, UK, France, Pakistan, India, China and North Korea for a nuclear attack against the Sontaran ship. She also co-ordinated the attack on the ATMOS factory when Colonel Mace led the attack. Along with Colonel Mace, she watched the atmospheric conversion from the ATMOS factory. As the UNIT soldiers around them cheered, she kissed Mace in a brief loss of self-control before realizing what she had done and composed herself. (TV: The Sontaran Stratagem / The Poison Sky)

Behind the scenes
Her insignia suggested that she was a member of the Royal Engineers.