That night, Worf discusses the situation with Helena. She reveals that Alexander has been misbehaving and is in desperate need of his father's guidance. Reluctantly, Worf agrees to take custody of the child. But when he discovers that the boy is lying and acting up in school, Worf threatens to send his son to a rigorous Klingon school.

Sensing that there's more to Alexander's behavior than meets the eye, Troi helps Worf realize that the boy's actions may be the result of feeling abandoned by his late mother and his father, who left the child to be raised by his grandparents on Earth. Worf begins to have second thoughts about sending Alexander to the Klingon school.

Meanwhile, feeling unloved by his father, Alexander seeks solace in the Biolab, home to his favorite animals. Just then, the crew discovers that the Soliton Wave test has gone dangerously awry. The wave's power level has increased so drastically that It could destroy a nearby colony. As the crew works frantically to create a backfire effect that could dissipate the wave and save the planet, they learn that Alexander is trapped in the biolab, where a fire has begun.

With seconds to spare, Worf and Riker rescue Alexander from the Biolab, while the crew successfully destroys the Soliton Wave. Realizing the loss he would feel if Alexander left the Enterprise, Worf asks his son to remain on the ship permanently.

Has appeared on-screen in more Star Trek episodes & movies as the same character, than anyone. ("Star Trek: The Next Generation" (1987), "Star Trek: Deep Space Nine" (1993) Seasons 4-7, Star Trek: Generations (1994), Star Trek: First Contact (1996), Star Trek: Insurrection (1998), & Star Trek: Nemesis (2002)).

Along with Jonathan Frakes, Brent Spiner, Marina Sirtis, Colm Meaney and Jeffrey Combs, he is one of only six actors to appear in the finales of two different "Star Trek" series. ("Star Trek: The Next Generation" (1987) and "Star Trek: Deep Space Nine" (1993))

Has stated that his favorite episode of "Star Trek: The Next Generation" (1987) is "The Drumhead".

Along with Armin Shimerman, he is one of only two actors to appear in eleven different seasons of "Star Trek" ("Star Trek: The Next Generation" (1987) Seasons One through Seven and "Star Trek: Deep Space Nine" (1993) Seasons Four through Seven.)

Played the same character, Worf, on "Star Trek: The Next Generation" (1987) and "Star Trek: Deep Space Nine" (1993) for twelve consecutive years from 1987 to 1999. The only other actor to do this is Colm Meaney.

He currently serves as a member of the Air Force Aviation Heritage Foundation.

Has appeared with Rene Auberjonois in five different productions: Star Trek VI: The Undiscovered Country (1991), "Aladdin" (1994), "Star Trek: Deep Space Nine" (1993), "The Savage Dragon" (1996) and "Captain Simian & The Space Monkeys" (1996).

Previously appeared with four of his future "Star Trek: Deep Space Nine" (1993) co-stars on "Star Trek" before joining the cast of that series. He appeared with Colm Meaney in many episodes of "Star Trek: The Next Generation" (1987), Armin Shimerman in the "Star Trek: The Next Generation" (1987) episodes "Haven", "The Last Outpost", "Peak Performance" and "Firstborn", Rene Auberjonois in Star Trek VI: The Undiscovered Country (1991) and Alexander Siddig in the "Star Trek: The Next Generation" (1987) episode "Birthright Part I" (although he and Siddig did not share any scenes).

Made a grand total of 282 "Star Trek" appearances. He appeared in 176 of the 178 episodes of "Star Trek: The Next Generation" (1987), 101 of the 176 episodes of "Star Trek: Deep Space Nine" (1993) Star Trek VI: The Undiscovered Country (1991), Star Trek: Generations (1994), Star Trek: First Contact (1996), Star Trek: Insurrection (1998) and Star Trek: Nemesis (2002). He also directed the "Star Trek: Deep Space Nine" (1993) episodes "In the Cards", "Inquisition" and "When it Rains..." and the "Enterprise" (2001) episode "Two Days and Two Nights".

Voice grew deeper, as a result of inflecting a bass tone for his Lt. Cmndr. Worf character.

Developed a mild skin condition for his years of wearing his "Next Generation" make up, for which the departments use a different type for alien effects.

The sci-fi world has compared his no-nonsense, ferocious character Worf to Star Wars' Chewbacca.

The Klingon proverb his Worf character is fond of:"It is a good day to die!" has been included in the StarCraft computer game dialog when clicking on the flying Corsair unit.