|Played By:||Frank Cassini|
Former acting-leader of a rogue NID operation, he was among those that went to other planets with the sole intention of procuring new technology regardless of the consequence. When he learnt that Jack was to become their new leader he was happy to have an experianced leader. However Jack soon revealed himself to be working for the SGC. Grieves was captured and taken back to the SGC where he was sentenced to be "hung" for treason.
When the SGC learnt that Grieves had broken the only protection one of the planets he visited had against the Goa'uld, the SGC were forced to recall him in an attempt to fix the machine. In light of the mission, his sentenced was to be reduced to a life sentence.
However, during the mission he learnt that the machine wasn't broken, but instead required a human component. Giving his life to save the people, he managed to use the weapon effectively against the Goa'uld.
 Key Episodes
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