The third one is going take a while to sort-out.
Michael,
I personally can't think of any post-Golitsyn true defectors or true KGB double-agents who worked for CIA and/or FBI, although I think Bagley insinuates that there might have been a few.
In my eyes, Oleg Kalugin (who was not really a defector), Oleg Gordievsky and Vasili Mitrokhin are all suspect (as is, btw, MI-5's official historian, Christopher Andrew), for the simple reason that they all claim that Yuri Nosenko was a true defector.
Andrew even has the gall to deny that Sir Roger Hollis was a traitor, when it's almost certain that he betrayed Oleg Penkovsky about two weeks after he'd been recruited by MI-6 and CIA.
All of which reminds me of what James Angleton said during his Church Committee testimony: "A triple-agent will tell you the truth about basically unimportant things 98 percent of the time, and will lie to you about important things the other 2 percent of the time, and he'll really mess you up, boy" (or words to that effect).
Caveat: As Bagley points points out in
Spy Wars, Department 14 was so shut-off from other KGB departments that sometimes KGB intentionally lied to its own officers, knowing that they would unwittingly perpetuate the myth of whatever Department 14 deception was being, or had been, run.
Bottom line: Maybe the guys I mentioned, above, aren't "false defectors"
per se, but former KGB officers who were lied to,
regarding Nosenko, by their superiors .
But, then again ...
Cheers!
-- MWT