Though the Cardassians made their debut on an episode of "Star Trek: The Next Generation," Dukat was a recurring character on "Star Trek: Deep Space Nine" where he took turns being both friend and ...

Jerry had plenty of failed relationships on Seinfeld, but only one of his girlfriends also appeared on Star Trek Deep Space ...

The Next Generation honored, and possibly exceeded, the Original Series, on the strength of these 20 classics.