In this episode, Deep Space Nine's operations chief Miles O'Brien begins having visions of the future after an accident, while a delegation from the Romulan Empire visits the station.
Complicating matters is the presence on the station of a crew of Klingons, another alien race with a history of poor relations with the Romulans.
Chief O'Brien, as an unexpected side-effect of radiation exposure, begins experiencing time shifts, each five hours into the future.
In 2018, Comic Book Resources rated "Visionary" the 13th best time-travel episode in Star Trek, noting it as a 'showcase' for O'Brien and calling the plot 'intriguing'.
[4] The episode was released on home video by Paramount on VHS (catalog number) VHR 4143, paired with "Distant Voices".