Complex sentence: Bareil arrives at the station to help, and at the same time, Miles and Lt. Jadzia Dax (Terry Farrell) discover a hidden sub-program on the station's computer created by Neela that setup a timed delay of forcefields running from the promenade to the Runabouts.
Split into simpler sentences: Bareil arrives at the station to help, and at the same time, Miles and Lt. Jadzia Dax (Terry Farrell) discover a hidden sub-program on the station's computer created by Neela. The program controls a timed delay of forcefields running from the promenade to the Runabouts.