The Enemy Within

MacGyver is paired with Viktoria Tomanova, a Russian female defector, who can identify a foreign killer and other agents. At a peace conference, Mac and the Viktoria witness the transformation of a priest into a mad killer, and his ensuing death. The enemy agent stealthily runs away. Craig Bannister helps Mac to solve the case, but he has been unknowingly brainwashed to get rid of Mac and Viktoria.