Sins of the Father is cool because it sets up a story line that continues all thru TNG and DS9, in fact it isn’t until the final season of DS9 when this issue with Worf’s father is settled. The other great thing here is Tony Todd who plays Worf’s brother, Kurn. After Michael Dorn, Todd does the next best job of portraying a Klingon, especially because he has to play a character more conflicted and less sure of himself than Worf. Todd also starred in one of the other great Star Trek episodes, DS9’s The Visitor, when he plays an elderly Jake Sisko.