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James J. Sloyan guest stars as K'matar, an old and trusted family friend of Lt. Worf's. K'mtar's arrival on the Enterprise coincides with Worf's seemingly futile efforts to transform his son Alexander (Brian Bonsall) into a proper Klingon warrior. Magnanimously offering to help out, K'matar takes Alexander under his wing, thereby setting into motion a plot resolution that has a far more profound effect on Worf than on his son. Armin Shimerman makes a crossover appearance in his Deep Space Nine role as Quark. First telecast April 30, 1994, "Firstborn" was scripted by Rene Echevarria, from a story by Mark Kalbfeld.