The inquiry held by Vulcan doctors into T'Pol's Pa'nar Syndrome, a disease linked to mind melds, which threatened to end her posting aboard Enterprise.
The hearing takes place in the Enterprise episode Stigma. T'Pol contracted Pa'nar Syndrome when Tolaris forced a mind meld on her in Fusion. Since melding is then practised only by a shunned minority on Vulcan, the illness carries deep shame and little research into it is shared.
At a medical conference on Dekendi III, Phlox discreetly asks Vulcan physicians for their findings. They become suspicious, confirm that T'Pol is infected and move to have her recalled.
One of the doctors, Yuris, is himself a secret melder. He tells Archer that T'Pol was attacked, but she refuses to plead it, since doing so would endorse the prejudice against the minority. Yuris then speaks up before his colleagues at the cost of his own position, and T'Pol stays aboard Enterprise.