Protection’s ending is all about Liz Nyles’ trying to make peace with the fact that even though she knew the whole truth, she wouldn’t be able to do anything about it. Her country and its leaders will always weigh the “national interest” above anything else. And that means they wouldn’t mind sacrificing a few lives just to protect their dirty secrets. [Spoiler Alert] So yes. In Protection’s ending, Liz did find out who really killed her lover, DS Paul Brandice, and who massacred the McLennan family under her witness protection program. But the tragedy here is, no one’s ever going to find out the truth. Liz has to take the secret to her grave, because if she dares tell a soul about it, then she’ll have to suffer the consequences. She will not only lose her job but will also put her family’s lives at risk.