Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A series-saving season if I ever saw one.

The first two seasons of Eureka were outstanding and original. Beginning in the third, however a sense of "been there done that" began to creep into each episode. Even the actors appeared to be losing interest. But happily, season 4 was just the infusion of freshness this series needed. Taking our main characters back in time, then sending them back to the present but in an alternate reality was stroke of genius, allowing the writers to reinvent many of the characters and their relationships, giving us some fresh takes on what was getting oh so stale. James Callis (aka Baltar from Battlestar Galactica) is a welcome addition to the cast this go around, as are the guest appearances of Wil Wheaton, the cross-over episode with Warehouse 13, and the return of sadly missed characters Nathan Stark, Beverly Barlowe, and Jim Taggart.Now, if only they can get Jordan Hinson back into the regular cast . . . this show would be perfect again!