In season two, Nadia and Alan are forced to learn through their time-body-hopping journies how to truly live despite their past trauma and the constant threat of death.
"Personal Jesus" by Depeche Mode is a recurring anthem for Nadia, referring to her own death and resurrection through time loops. In the first episode of season two, while Nadia is crossing the street, a taxi just misses her — a clear callback to her first death in the show's premiere episode.
In season two episode five, when we see Nadia's grandmother's friend Delia (Franciska Farkas) in the past for the first time, she is wearing a black funeral veil. This could refer to the loss they have both felt due to the war, but also to Nadia still chasing death with her recklessness.
Finally, after Nadia breaks the flow of time in episode six, we see the Jewish school that used to be in Maxine's flat. The room has a grey tone making the rabbi and students appear almost like ghosts.
Coincidentally, the Rabbi at the front is instructing the class about the Sheol, a place where people's souls will go after death, according to the Hebrew Bible.