In season 2 episode 8 “Hazards” we get a look into Sydney and Jacob’s past during world war 2.
More updates will be made here over time.
Other related articles here around the WW II time period: The Centre Chronicles.
In the tP FF forum, we have found, with a fans help (Susan) another tP prequel story about a young Sydney during the world war 2 era. It can be found here: https://www.fanfiction.net/s/5246927/1/Nur-nach-Hause
It is written in German, but stay tuned here for an update on an English translation coming soon!
Check back here for continuous updates as they come in under this topic. tP GUIDE is currently searching the fandom for more article on this topic and will put the links here as they are found. Any help would be appreciated to linking the tP universe together here at the TPL!