The NID is suddenly a lot more organized and a lot more focused on their insistence of taking control of this one particular goa'uld.

The SGC isn't sure if the NID are simply intent on vivisection or if the father has infiltrated them in order to rescue his son. Are they trying to protect the goa'uld from the NID or rescue the NID from another goa'uld? And why do they feel vaguely dirty about both options?

Heh.