Episode 4 Discussion

[HellsBells]

I don't think Oleg knew about Sarah being part of Nightingale, he just knew that the there was a meeting of security agents and (possibly) they were planning changes. He assumed Lucas would be involved in defeating any such plot and therefore in potential danger. As Oleg "cared" about Lucas he was genuinely warning him not to trust anyone.

I do wish we had seen more of what happened between Oleg and Lucas in prison, how their relationship developed, because in the end Oleg trusted Lucas.