Laure's age
In Season 2 she claims to be 34 then in Season 4 we see her age is written down as 39. (Unless I misread)
There is 4 years between 2 and 4 but the storyline suggests not much time as passed. In season 3 she's still dealing with the near botched operation that almost cost Sami his life (they indicate that's what the bosses think of it) that suggests not much time has passed. In season 4 they stage a reconstruction not long after and Pujade noted to have been with the team for only a few months.
Somehow Laure has aged 5 years in a year.