David Tennant is once again on American TV screens! Caroline shares some brief thoughts on Tennant’s new series “Gracepoint.” Then the hosts jump into this week’s controversial new episode “Kill The Moon.” Does the central moral dilemma work? What’s up with Clara and the Doctor’s relationship? And is there a social metaphor going on here? Then in part two Caroline and Alasdair look at two episodes in which the Doctor must make a tough choice: “Boom Town” and “The Girl Who Waited.”