Personally, I believe that Option 3 is the most likely

I hope so - It's certainly going to cause the most angst for Jack and that's interesting to me. ;-)

I don't know... Maybe there was a surveillance camera - Maybe the Doctor *did* provide some details to surviving Torchwood agents trying to clean up the the loose ends... The writers have a million options on this one - Time will tell.

Argh! Too many potentialities! Brain go ouch now.

Mhauhahaha! Serves you right for hooking up with a Time Lord!