Jadzia Dax's Death (Star Trek Deep Space 9)

On Deep Space 9, as Captain Benjamin Sisko looks on, Lieutenant Commander Worf and his wife Jadzia Dax share their final words, and Dax regrets that the two will now never have children. She touches Worf's face and as she takes her last breath, she says that their baby would have been beautiful. Jadzia dies, and as Worf howls in the Klingon tradition to let the spirits know that Jadzia is on her way to Sto-vo-kor, a devastated Captain Sisko can do nothing but watch.