Being genetically engineered for one purpose makes Tosk a similar species to the Jem'Hadar, which will play a very important role in the later seasons of the series. Also, the cloaking ability used by Tosk is similar to that used by the Jem'Hadar. This suggests the possibility of a relationship between the two. In fact, the script for “The Jem'Hadar” states that the cloak was to be identical to the one in this episode. Indeed, Robert Hewitt Wolfe himself states that “the same people who breed the Tosks as gifts to the hunters, breed the Jem'Hadar as well.” (Star Trek: Deep Space Nine Companion)