Fifth Sontaran Army Space Fleet

In the 13th century, (TV: The Sontaran Experiment) Commander Linx of the Fifth Sontaran Army Space Fleet was shot down by a Rutan fighter squadron and ended up stranded on Earth, where he was eventually killed trying to repair his ship. (TV: The Time Warrior)

Behind the scenes

 * The organization is called the "Fifth Sontaran Army Space Corps" in the novelisation, and the "Fifth Sontaran Battle Group" in Who Are The Sontarans?