Revealing mistake: As Kurn is chastising Worf in the infirmary, the actor's prosthetic nose has become detached from the rest of the Klingon make up. You can see the nose wobbling around as he talks.
Continuity mistake: At the beginning of the episode when arriving at the station, Worf's brother has normal human bottom teeth. Later in the episode, he is wearing Klingon bottom teeth cosmetics.
Answer: He changed his name after the third season because people were having difficulty pronouncing his last name."Alexander Siddig" is the name he typically goes by as his full birth name, "Siddig El Tahir El Fadil El Siddig Abderahman Mohammed Ahmed Abdel Karim El Mahdi", is far too verbose and complex for screen credits.
MoonFaery ★