Thunderbirds Episode Ratings Heatmap
1965 · 2 Seasons · 32 Episodes · Overall Score: 7.6/10 (31 rated)
Season 1 holds the highest collective average score across the series.
Season 1 Details →Lowest score variance (σ = 1.31), maintaining an average of 7.9.
Complete Episode Rating Matrix
Interactive score chart by season and episode number. Darker green indicates higher ratings; amber and red denote lower reception.
| Episode | Season 1 | Season 2 |
|---|---|---|
| Ep 1 | 7.6 | 9.0 |
| Ep 2 | 8.0 | 7.0 |
| Ep 3 | 9.0 | 6.0 |
| Ep 4 | 10.0 | 5.0 |
| Ep 5 | 7.0 | 8.0 |
| Ep 6 | 7.5 | 4.0 |
| Ep 7 | 6.5 | – |
| Ep 8 | 10.0 | – |
| Ep 9 | 8.0 | – |
| Ep 10 | 8.0 | – |
| Ep 11 | 9.0 | – |
| Ep 12 | 10.0 | – |
| Ep 13 | 6.0 | – |
| Ep 14 | 6.0 | – |
| Ep 15 | 8.0 | – |
| Ep 16 | 8.0 | – |
| Ep 17 | 7.0 | – |
| Ep 18 | 7.0 | – |
| Ep 19 | 6.0 | – |
| Ep 20 | 9.0 | – |
| Ep 21 | 8.0 | – |
| Ep 22 | 6.0 | – |
| Ep 23 | 10.0 | – |
| Ep 24 | 7.0 | – |
| Ep 25 | 8.0 | – |
| Ep 26 | – | – |
| Season Avg | 7.9 | 6.5 |
Ratings Analysis & Trajectory
Across 2 seasons and 32 episodes, Thunderbirds has earned an overall series rating of 7.6 out of 10. The series reached its critical peak early, showing a slight contraction in audience satisfaction in later chapters.
The single highest-rated hour of television in the series is Season 1, Episode 4 ("Terror in New York City"), rated at an extraordinary 10.0/10 with 1 ratings. Conversely, the lowest-rated installment is Season 2, Episode 6 ("Give or Take a Million"), landing at 4.0/10.
The most precipitous single-episode shift occurred in Season 1 between Episode 12 ("Operation Crash-Dive", 10) and Episode 13 ("Vault of Death", 6), a swing of 4 points.
Top 10 Highest Rated Episodes of Thunderbirds
| Rank | Episode | Title | Score | Votes | Air Date |
|---|---|---|---|---|---|
| #1 | Season 1, Ep 4 | Terror in New York City | 10.0 | 1 | Oct 21, 1965 |
| #2 | Season 1, Ep 8 | Desperate Intruder | 10.0 | 1 | Nov 18, 1965 |
| #3 | Season 1, Ep 12 | Operation Crash-Dive | 10.0 | 1 | Dec 16, 1965 |
| #4 | Season 1, Ep 23 | Attack of the Alligators! | 10.0 | 1 | Mar 10, 1966 |
| #5 | Season 1, Ep 11 | Sun Probe | 9.0 | 2 | Dec 9, 1965 |
| #6 | Season 2, Ep 1 | Atlantic Inferno | 9.0 | 2 | Oct 2, 1966 |
| #7 | Season 1, Ep 3 | The Perils of Penelope | 9.0 | 1 | Oct 14, 1965 |
| #8 | Season 1, Ep 20 | Move – And You're Dead | 9.0 | 1 | Feb 10, 1966 |
| #9 | Season 1, Ep 2 | Pit of Peril | 8.0 | 2 | Oct 7, 1965 |
| #10 | Season 1, Ep 9 | End of the Road | 8.0 | 2 | Nov 25, 1965 |