De acordo com Memória Alfa ;
Between the fourth and fifth seasons of Star Trek: The Next Generation, Dorn played Colonel Worf in Star Trek VI: The Undiscovered Country. Although the relationship was not stated on screen, the filmmakers' intention was that the Star Trek VI character was the grandfather of the Next Generation character. (Star Trek Encyclopedia)
Em uma entrevista com Michael Dorn (visto às 1h20m32s) durante The Undiscovered Segmento do Special de 25 anos ele declara esse relacionamento.