Worker
Fast worker
Settler
Missionary
Executive
Great Person
Great General
Spy
Workboat
Let's keep things simple.

Add Airship.
Worker
Fast worker
Settler
Missionary
Executive
Great Person
Great General
Spy
Workboat


Add catapults, trebs and other siege units to that... Anyway.
I think that the unit is the Indiaman, but I can't remember who had CRE-FIN. Random guess Cathy.





GSPY can only* be killed in city squares, either for a infiltration or falling with a captured city.