A string wall with photos of several people from Winden was located in the bunker in 2052. There were different photos of the same people from 1953, 1986 and 2019. Relatives were connected by string, as a sort of family tree.
- The red string moves from Mikkel/Michael in "Secrets" to Jonas/The Stranger in "Alpha and Omega".
- The photos of teen and adult Jonas are connected by string, but not placed side by side as others.
- There is an empty photo pocket next to Peter Doppler.
- Charlotte Doppler is connected directly by string to her grandfather H.G. Tannhaus, not through her parents.
- Where and when is the string wall?
- In the bunker in 2052.
- Who created and maintains the string wall?