Has anyone seen citadel?

SPOILERS AHEAD



So I just finished season 1 of citadel and 2 questions:
1)Can Celeste get her memories back because Mason was able to?
2)Is Nadia's father innocent are we just going to ignore the fact that he is a TERRORIST
3)Why did Mason do all that and suspect Nadia if he was really the mole?
4)I find it surprising Dahlia really doesn't love Mason. She was about to kill her granddaughter! Twice actually as she threatened both of them. And also told someone that Mason gave her info. Who did she tell? How did Mason all of a sudden know who his mother was?
5)Is Bernard dead?

Okay, so this is more than two but anywho.