For those that are interested, from left-to right, these are:
* Prince Thrakhath-main head
* Hobbes (I also have his hands, his feet, and his uniform)
* A miscellaneous animatronic head
* Thrakhath-backup head (used for the cockpit VDU scenes)
* A background head, which was not designed for animatronics (it's just a big mask)
The problem I'm having is...they're falling apart--Hobbes is in particularly bad shape, and I don't know how much it would be to get them restored.