When Star Trek: Deep Space Nine debuted 30 years ago during the broadcast TV mid-season, it was markedly different from the other two entries in the franchise. It was the first series set on a space station as opposed to a Starfleet vessel, dealing with heavier political topics than the always-political series had before. Yet, what made Deep Space Nine so unique was that it was the first time Star Trek tackled religion in a truly respectful way. In the first episode, "Emissary," Commander Benjamin Sisko was a disaffected Starfleet officer tasked with bringing the Bajoran people into the Federation fold.
Source：https://www.cbr.com/star-trek-deep-space-nine-religion/
