Usual host 400-Rabbits takes a turn as the interviewee, speaking on the relationship between the sister cities of Tenochtitlan and Tlatelolco. The early history of the Mexica, the founding of the cities, and their different trajectories in Mesoamerican history are covered, culminating in the 1473 CE war between the two polities. In the background of the episode is the problem of interpreting primary sources, their biases and inconsistencies.