Seasons 1 through 3 are some of the best Tv has to offer. Season 4 was pathetic. The writing was horrible, charachters disappeared or lacked development. The ending episode was a dissapointment. 2 of the episodes in season 4 were fantastic, specifically episode 9. The worst part is that we watched John Smith and it seemed like the writers took the focus away from Julianna the hero, probably because she is boring, but tried to make us think John was truly a good person, but he actually just got worse and worse and lost his mind when he entered the other reality. Overall id give it about an 80 overal because to me finishing a show right is the most important thing. The only other great show to let me down this bad was Game of Thrones. They both had similar bad endings. Poor writing, felt rushed, ruined charachters. I would still reccomend but be prepared to be dissapointed