Who's Who: Abba Shaul. Also, terumah that becomes impure - what happens if you replant that terumah? The Gemara focused on the issue of "hesach ha-da'at" - a break in paying attention to the terumah (or what had been terumah), and the implications of that shift of focus. Plus: The judging of the sages of Babylonia by... the sages of Israel, and their harsh language. And also: the water of the water libations of Sukkot, and the question of impurity in this regard.