Stor

Commander Stor of the Sontaran Special Space Service was the leader of the first raid in the Sontaran invasion of Gallifrey. He was identified from the other Sontarans in his unit by a large rim on his helmet along with a bold white crown logo above the eye holes. The logo was similar-if not the same- as the one on Linx's helmet where it was made out of dots. he was killed by the Fourth Doctor when he activated a forbidden Gallifrean De-mat Gun which took Stor and his unit out of time and space- it also wiped the Doctor's memory of the events of (DW:The Invasion of Time).