Senstarg

Senstarg is a Sontaran Scientific Officer, as part of Commander Stenck's fleet during their invasion of Earth, due to the Grand Serpent allowing them access through the shield of Lupari ships surrounding the planet. Stenck's ship was stationed at the Dark Energy Camera facility in Chile, which Senstarg congratulated him for, calling it a "wise" strategic move, even though it was Grand Serpent's idea.

Claire and Professor Jericho were captured by the Sontarans, and Senstarg had them linked to a quantum reader, to psychically evaluate all possible timewaves to pinpoint the coordinates for the final Flux event. Senstarg successfully finds it, and Stenck launches their Flux Offensive; bring the Daleks and the Cybermen to Earth, under a false peace treaty, and leave them to be consumed by the Flux, while the Sontaran fleet are protected behind the shield of Lupari ships. Claire escapes, but Jericho is trapped on the Sontaran ship, as the Lupari ships form their shield; this time, behind the Sontarans, leaving all wide open for the Flux. Senstarg enters and prepares to shoot Jericho, but the Flux destroys the entire ship, killing them both (TV: The Vanquishers)