The science minister of Kaelon II in Half a Life, who demands that the scientist Timicin return home for his ritual death, the Resolution, and refuses to consider any exception.
B'Tardat is the minister of science on Kaelon II, an isolationist world whose sun is failing. He appears in the fourth-season episode Half a Life, set in 2367.
He approves the collaboration in which the scientist Timicin tests a method of reigniting a star with the Enterprise's help. When the trial fails, B'Tardat expects Timicin to come home, since he is about to turn sixty, the age at which every Kaelon ends his life in the ceremony called the Resolution.
Timicin, urged on by Lwaxana Troi, asks for asylum so that he can finish his work. B'Tardat is appalled. He declares that no further research from Timicin will be accepted and sends warships to see that the Enterprise does not leave with him, pressure that helps persuade Timicin to return.