Wojciech Jakubowski (polish underground actor) was actually on his vacation in US, and was invited by his friend to see the set of Stargate SG-1. When Peter DeLuise saw Jakubowski, he was struck by his 'soldierish' look and asked if he wouldn't play a soldier in The Tomb (2001) episode. Jakubowski agreed and both men liked the cooperation so much, that he played in two more episodes - Wormhole X-Treme! (2001) and Proving Ground (2001).
This episode is extremely similar to Star Trek: The Next Generation Lower Decks (1994), which was also written by Ronald Wilkerson.
The return of newly commissioned 2nd Lieutenant Jennifer Hailey. Last season she was an Air Force cadet in the episode Prodigy.