<sod>* "Infection" marks the first mention of Interplanetary Expeditions, or IPX, an archaeological research corporation with ties to secret government projects and weapons research. The company is featured prominently in the third season episode "[[Messages from Earth]]."<eod>
<sod>* "Infection" marks the first mention of Interplanetary Expeditions, or IPX, an archaeological research corporation with ties to secret government projects and weapons research. The company is featured prominently in the third-season episode "[[Messages from Earth]]."<eod>