Sorry if this has already been discussed (first post here) - but the fact that HIM (the electric zombie) continues to respawn in games following completion of the ToB (where we destroyed HIM) leads me to think that we have to do something with HIM to activate the "tertiary node" referenced by Maxis. As a side note, I completed the Maxis side, so I am not sure this would apply to the Richtofen side or not.
Has anyone tried luring HIM to the Church and putting down a turbine and EMP'ing HIM? I have tried but keep getting overwhelmed before I can get an EMP off. I remember reading in one forum that they lured HIM there, and he appeared atop the church where we have seen posters of the lightning striking. Could be the third "node" we need to activate. Has anyone disproved this theory?