T’Les (Joanna Cassidy) was an instructor at the Vulcan Science Academy in the early 22nd century: she was the mother of T’Pol (an awkward meeting for Trip – though she came to like him).
T’Les had been forced into an early retirement due to the falsified charges by the Vulcan High Command and later joined the Syrrannites. She went into hiding when the Syrrannites were falsely accused of bombing Earth’s embassy on Vulcan.
T’Les died in her daughter’s arms when the Vulcan High Command bombarded the Syrranites’ compound.
Michael Westmore was the makeup designer and supervisor on Star Trek: Enterprise.