Initially I just shared my personal top 10 lists (e.g., Star Trek: TOS) before pivoting to use IMDB ratings (e.g., Lower Decks). Having done that, I then started to wonder how long I have to wait after a premiere before an IMDB rating is stable.

My hypothesis has been that early ratings are by the biggest fans and therefore represent the peak rating, with stable ratings being lower as non-fans eventually catch up and watch something.

Section 31

That proved itself in spades with Section 31, which premiered at 4.4 before dropping to an average rating of 3.8 five days later. That makes it not only the worst-rated Star Trek movie of all time, but—had it been released theatrically—it would have tied at #100 on IMDB’s list of Top 100 worst-rated movies of all time.

DateRankingVotesPopularity
1/244.450NA
1/254.13100NA
1/264.04300#435
1/274.05900#19
1/283.96800#19
1/293.87500#19
7/213.816000#2,009

But it only took 5 days for it to find its stable rating, which it has held now for 6 months. 

26% rated 1 out of 10
13% rated 2
14% rated 3
12% rated 4
and so on to 
2% rated 9
5% rated 10
for an average of 3.8

For me, the best part of Section 31 are the reviews:

Screen capture from Section 31: Vulcan saying, "Look, none of this is making any sense."

Lower Decks

You can see that most Season 5 Lower Deck ratings have dropped by a point or two since the first week they premiered. For those that dropped, it took an average of 12 weeks (3 months) for them to reach their current level, seven to ninth months later.

E#EpisodePremiereFirst RatingLast RatingDeltaWeeks
S5.E1Dos Cerritos10/24/247.87.7-0.110
S5.E2Shades of Green10/24/247.57.3-0.212
S5.E3The Best Exotic Nanite Hotel10/31/247.47.3-0.110
S5.E4A Farewell to Farms11/7/247.77.5-0.212
S5.E5Starbase 80?!11/14/247.87.6-0.214
S5.E6Of Gods and Angles11/21/247.57.3-0.217
S5.E7Fully Dilated11/28/248.18.100
S5.E8Upper Decks12/5/247.77.6-0.15
S5.E9Fissure Quest12/12/249.09.00.00
S5.E10The New Next Generation12/19/249.18.9-0.213

(Related, I wonder if early episodes of a new series have lower ratings than later episodes because the people who dislike a series stop watching it and aren’t around to rate later episodes. That’s not true for the ratings for Star Trek: Discovery though.)

I tracked these in a spreadsheet before discovering Historical-IMDB-Ratings.com:

This is the lowest rated SNW episode, and you can see it started at 7, dropped to 6 the next week, then increased to 6.2 over time.

Based on this, I think I’ll wait until Season 3 of SNW has been done for 3 months before updating my Strange New Worlds best-of links.

Photo credit: StarTrek.com.