Caroline and Alasdair look at a pair of devastating farewells, as they tackle Rose’s swansong in “Army of Ghosts” / “Doomsday” and Amy’s (and Rory’s, don’t forget Rory’s) departure in “The Angels Take Manhattan.” Which one makes Caroline cry harder? What’s the only part of either of these episodes that truly melts Alasdair’s stone heart? (Hint: It involves Jackie.) And how weird is it that Freema Agyeman is in one of these as not-Martha?