First Sensorite

The First Sensorite was one of two Sensorites warriors who boarded Maitland's ship.

Biography
After some tense moments, the two Sensorites negotiated with the First Doctor that he, Susan, Ian, Carol and John would accompany one Sensorite to the Sense Sphere, while the other Sensorite would remain on the ship with Maitland and Barbara. (TV: The Sensorites)