 In the case of "Wrongs Darker Than Death or Night", it seems to be similar to an observer style where visitors from the future do not significantly affect the timeline.Deep Space Nine also portrays the station during the occupation in the previous season , which had some similar themes including Dukat's taking of Bajoran woman, which also provides a back-story to his daughter Ziyal.In that episode it is Jadzia who is chosen, however, its more like re-living a memory than time travel and the Orb of Time may be misunderstood as time travel device when it more or less allows a user to have an interactive dream with past events.