Ep 17. Visionary

The Star Trek: Deep Space Nine season 3 episode 17, "Visionary" follows Chief O'Brien as he experiences hallucinatory time-travel. O'Brien discovers that he is dying due to radiation poisoning from a nebula that the station is passing through and only has a few hours left to live. With the help of the station's medical team, O'Brien manages to find a way to time-travel and see his future, but the consequences are beyond what he could have imagined.

As the episode progresses, O'Brien continues to travel through time, experiencing different timelines and possibilities. He discovers that he plays an important role in an impending disaster and that there may be a traitor on the station. With each trip through time, O'Brien learns a little more about what is to come, but the stakes are high and the clock is ticking.

The tension builds as O'Brien races against the clock to prevent a catastrophic event from occurring, while at the same time struggling with the knowledge of what is in store for him. Ultimately, it is up to O'Brien to save the day and set things right.

The episode explores themes of sacrifice, heroism, and the nature of time, as O'Brien is forced to confront his own mortality and put his own life on the line for the greater good. As the chief engineer, O'Brien is already a respected member of the crew, but he steps up even further in "Visionary," showcasing his expertise, bravery, and loyalty to the station and its inhabitants.

Overall, Star Trek: Deep Space Nine season 3 episode 17 "Visionary" is a thrilling and emotional ride, showcasing the best of the series' character-driven storytelling and science fiction concepts.