Here is the average ranking of the episodes in each season.
Season One: 94.8
Season Two: 95.5
Season Three: 71.8
Season Four: 68.6
Season Five: 83.8
Season Six: 78.0
Season Seven: 99.8
Not surprisingly, season four is in the lead despite having only one episode in the top ten (and it was tenth). It’s worst episode was #139 which really helps. There is not one dreadful episode there, which is a comfort for the viewer. By contrast, season five had two episodes in the top ten and four in the top twenty, but was brought down significantly by having three episodes in the first week of the countdown.
Season one’s average is expected, but I was a bit surprised that season two finished behind. The additions of Pulaski, Guinan, and Geordi’s promotion to chief engineer were all highly welcomed. And the episodes ranked #9, #8, and #7 all came from season two. However, there’s a lot of middling episodes that could have been great had they been done in later seasons, and plenty of bad ones as well, including the season finale.
Sadly, the final season ranks dead last, and I’m comfortable with that. There’s really only four episodes I really liked from that season: Attached, Paralles, The Lower Decks, and All Good Things. The Gambit was decent. Everything else is either trash or has recycled plots from previous seasons.