If you’re working on the Second Conflict mission and you’ve arrived at the Totentanz only to find that Dum Dum is missing and there’s no way to progress, you’re in luck. Here’s what you need to do:
1. Revert to a save from before you called Nancy Hartley (Bes Isis)
2. Fast travel to the All Foods factory (screenshot below)
3. Call Nancy
4. Head over to the Totentanz and make your way upstairs – Dum Dum will be waiting by the door
Comment below and let me know if this worked for you!
It worked for me.