Berat...well, I dunno how he'd do as an actor, but in appearance and temperament, I definitely have Cal Ripken, Jr. in mind. For Spirodopoulos, Rufus Sewell (though for the role he'd need to speak with a near-American accent, just a trace of Greek).
Folani, not sure yet. The actress would be of African descent and keep her hair cut short, but I'm truly not sure who to cast. While I'm reminded of the actress who played Lily Sloane as far as basic mannerisms, Folani's hair and complexion are darker.
Ooooh, and thanks for your kind words, Mistral--I really appreciate your reading!