The Enterprise plays host to a mysterious visitor who claims to be from the future.
While the Enterprise heads for Bilana Three to participate in the testing of a new propulsion method called the Soliton Wave, Worf receives an unexpected visit from his mother Helena and his son Alexander.
The Enterprise makes way to a nearby Starbase that has recently lost contact with the Vico, a research vessel sent to explore the Interior of a Black Cluster.
Picard's efforts to save a genetically engineered society from a natural disaster threaten to destroy it.
A little girl's imaginary friend becomes a frightening reality for the crew when she threatens to destroy the Enterprise.