Jingo Linx

Linx was a Sontaran Commander in the Fifth Sontaran Battle Group.

He was battling against a Rutan squadron near the Sol system when he was forced to abandon his battle ship and take his scout ship to Earth for repairs in the 13th century. Linx allied himself with Irongron, who offered him shelter in exchange for advanced weaponry.

Linx abducted scientists from the late 20th century to help him repair his ship. He went with Irongron to watch the attack upon Edward of Wessex for his own amusement. He died when Hal the Archer shot an arrow in his probic vent, and his ship exploded soon thereafter. (DW: The Time Warrior).

Other information
Linx was mentioned briefly by Sarah Jane Smith. After meeting Styre, another member of the cloned Sontaran race, she briefly thought he was the same person, though she herself said that was impossible as she had seen Linx's ship blow up.

Styre explained that as Sontarans are clones, he and Linx were identical. (DW: The Sontaran Experiment)

When The Doctor and Linx spoke to each other for the first time, it was revealed that he and Linx have met some time before the events of The Time Warrior.