There's a long history of "Star Trek" actors contributing to their characters in some way, and that holds especially true for "Star Trek: Deep Space Nine." While franchise creator Gene Roddenberry was very hands-on for the original series and "Star Trek: The Next Generation," his passing in 1991 meant that future "Star Trek" shows had a bit more wiggle room. In particular, the alien races were able to be fleshed out more, with new storylines and depth given to the Ferengi, Klingons, and even the villainous Cardassians (who were originally inspired by Nazi Germany). One Cardassian even ended up becoming...