He is surprised to learn that Helena intends to leave Alexander with him on the Enterprise; she and her husband Sergey are having too much trouble caring for the boy in their old age, and she feels that he needs to be raised by his father.
Soon after Alexander is enrolled in the ship's school, his teacher voices concerns to Worf about his behavior, such as lying, bullying other students, and taking their toys.
Tensions between father and son rise after Alexander refuses to admit stealing a model during a class field trip and Worf finds it in his pocket.
Worf and Riker find him pinned under debris and rescue him just in time for the Enterprise to fire the torpedoes and prevent the colony from being destroyed.
Dr. Crusher diagnoses Alexander with smoke inhalation and a broken leg and assures Worf he will be fully recovered after an overnight stay in Sickbay.