Horatio: The husband is dead... the wife is dead...
Frank Tripp: The Russian's dead.
Horatio: Yes. Let's go talk to the other Russian, the cousin, before he chokes on a Twizzler.

Horatio: He's lying.
Frank Tripp: Of course he's lying, he opened his mouth.

Horatio: You see, I think if we connect these two cases, we'll have a shot at probable cause.
Frank: The probable cause is that she's a stripper, she's a junkie, and she's a whore.
Horatio: She's also a human being.
Frank: And now she's a corpse.

If the Russian was stabbed and died, who put the last token in the booth to raise the screen? There was not enough time for him to do so before he died.

Title: Evidence of Things Unseen

The title of this episode pays homage to the Marianne Wiggins novel, "Evidence of Things Unseen".