Doctor T'Pan was a Vulcan scientist and practically a legend in the field of subspace morphology. She was director of the Vulcan Science Academy from 2354 to 2369 and was married to the Human scientist Dr. Christopher.
T'Pan was present for the test of Dr. Reyga's metaphasic shielding aboard the USS Enterprise-D in 2369. She was doubtful of the technology's success. It did indeed work, although the first test was sabotaged.
T'Pan was suspected as the saboteur of the flight and murder of Reyga. It was believed that she became jealous of Reyga and wanted to prevent him from displacing her as the preeminent scientist in her field. She was later cleared when Dr. Jo'Bril confessed to the crimes. (TNG: "Suspicions")