Heath was a GalSec colonist on a military expedition who followed a fake distress call to Earth when Styre stranded them by vaporising their spaceship. Heath, Splear and Roth were captured by Styre's robot and tortured by Styre as part of his experiment. Heath and Splear were killed, but Roth was able to escape. (TV: The Sontaran Experiment) By another account, Roth's murdered fellow captees were named Warra and Henk. (PROSE: Doctor Who and the Sontaran Experiment)

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