(S03E04) "Ohh, dude." -- Jack Carter, on learning he would have to memorize a formula for the next time loop shift.

Boy, I do loves me a Groundhog Day episode! No, I don't mean an episode of a show where they pull a helpless groundhog out of its hole in the cold of winter just to "predict" what's coming up in the next six weeks. I'm talking an episode that features some sort of time loop where a character or characters relive a particular day over and over again. As they go along they learn from the mistakes they made in previous loops. Eventually, through some way that usually isn't understandable, the time loop is closed and things move forward. It's been done on past shows like Star Trek: The Next Generation and The X-Files.

Now, Eureka joins their ranks with another Groundhog Day episode. At first, I was looking forward to the episode. And, as it progressed, I really enjoyed how the story expanded and how Carter put the pieces together. Then, came the solution and....Oh, no no no no no! (SPOILERS AHEAD)