Alexander: "Are you my father?" Worf: "Yes...I am your father." -

Related:

• K'Ehleyr: "What shall I tell Alexander, that he has no father?" -
  "Reunion", Stardate...
• Worf: "You know my feelings." K'Ehleyr: "Maybe I've forgotten." -
  "Reunion", Stardate...
• You claim a birthright you have forsaken? I have not forsaken my heritage.
  I am Klingon. My heart is of this world. My blood...
• Alexander: "I don't want to be a warrior!" -- "Reunion",
  Stardate...
• I am a Klingon. If you doubt it, a demonstration can be arranged.
  That is the response of a Klingon. The response I would...
• Saddle up, father --
  Alexander, to...
• K'Ehleyr: "The son who betrays his people to the Romulans,
  just like his father did." -- "Reunion", Stardate...
• Tarmin: "But there is nothing to fear?" Jev: "Father.
  " Worf: "I am not fearful." -- "Violations", Stardate...
• For what it's worth, I understand your bitterness. With respect sir,
  you cannot. I am asked to give up the very lifeblood...