Stardate:43349.2. A blind Geordie is trapped on a hazardous planet with a paranoid and severely injured Romulan. In orbit, a Romulan Warbird is preventing the Enterprise from attempting a rescue mission.

Stardate: 43625.2. A rift in the space/time continuum brings the U.S.S. Enterprise - C forward into the 24th Century, and alters the timeline. In this future, the Federation is at war with the Klingons, Tasha Yar is on the bridge, Worf did not join the Federation, and only Guinan's unique perception of reality may restore the timeline.

Stardate: 45020.4. Picard suspects a Romulan influence in the recent Klingon civil war, and must force the Federation to intervene before the Empire collapses.

Stardate: 45092.4. While the Enterprise helps a Romulan science vessel, an accident occurs which forces Geordi LaForge and Ro Laren slightly out of 'phase', causing them to become undetectable to everyone but each other. As a result, the crew thinks they are dead and make arrangements for their funerals, even though they are closer than the crew realise.

Stardate: 47988.0. Shortly after Picard is diagnosed with a long-term, potentially debilitating brain disorder, he starts experiencing bizarre shifts into three main time periods: 25 years into the future, a few days before the Enterprise-D is sent on its mission to Farpoint station, and the present. Picard realizes that Q is behind these shifts through time.

Stardate: 47988.1. After his encounter with Q, Picard assembles the senior staff, and wonders if Q is actually giving him a chance to save humanity by showing him that the spatial anomaly also exists in the past. As they talk, the ship reaches the Neutral Zone, then Picard returns to the future, where Beverly's ship is also on the edge of the Neutral Zone. He convinces a reluctant Worf to accompany the group into Klingon territory, and then travels to the past, where he orders the crew into the Devron system.