Eureka S4 (2010-2011)

EurekaSeason4

The show managed to stay fresh without changing the core concept, which it did through a displacement of the main cast into a subtly different timeline. The changes were kept to the personal level, which allowed the show writers to infuse more drama without doing stupid tricks like forcing annoying and pointless new characters into the show.

The second part of the season also introduced a planned mission to Titan, which was a great way to show that Eureka is more than a weekly show about zany pseudo-science going wrong and instead could actually be useful (though the FTL-drive looked more like a transporter to me and I wonder why they needed all the training and preparation for stepping through one).