Perry Mason Episode Ratings Heatmap
1957 · 9 Seasons · 271 Episodes · Overall Score: 7.5/10 (65 rated)
Season 9 holds the highest collective average score across the series.
Season 9 Details →Lowest score variance (σ = 0.35), maintaining an average of 9.0.
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 | Season 3 | Season 4 | Season 5 | Season 6 | Season 7 | Season 8 | Season 9 |
|---|---|---|---|---|---|---|---|---|---|
| Ep 1 | 8.0 | 10.0 | – | 7.5 | – | 2.0 | 9.0 | – | 9.0 |
| Ep 2 | 8.0 | – | – | 8.0 | – | – | 9.0 | – | 9.0 |
| Ep 3 | 7.0 | – | – | 5.0 | – | – | 8.0 | – | 9.0 |
| Ep 4 | 8.0 | – | – | – | – | – | – | – | 9.5 |
| Ep 5 | 8.0 | 10.0 | – | – | – | – | – | – | 9.0 |
| Ep 6 | 8.0 | – | – | – | – | – | – | – | 9.0 |
| Ep 7 | 8.5 | – | – | – | – | – | – | – | 9.0 |
| Ep 8 | 8.5 | – | 8.0 | 1.0 | – | – | – | – | 9.0 |
| Ep 9 | – | 1.0 | – | – | – | – | – | – | 9.0 |
| Ep 10 | – | – | – | 1.0 | – | – | – | – | 9.0 |
| Ep 11 | 8.0 | – | – | – | – | – | – | 1.0 | 9.0 |
| Ep 12 | – | – | – | – | – | – | – | – | 9.0 |
| Ep 13 | – | – | – | 1.0 | – | – | – | – | 9.0 |
| Ep 14 | – | 8.0 | – | – | – | – | – | – | 9.0 |
| Ep 15 | – | – | 1.0 | – | – | – | – | – | 9.0 |
| Ep 16 | – | – | – | – | – | 7.0 | – | – | 9.0 |
| Ep 17 | – | – | – | – | – | – | – | – | 9.0 |
| Ep 18 | – | – | – | – | – | – | – | – | 10.0 |
| Ep 19 | – | – | – | – | – | – | – | – | 9.0 |
| Ep 20 | – | – | – | – | – | – | – | – | 9.0 |
| Ep 21 | – | – | – | – | – | – | – | 0.5 | 9.0 |
| Ep 22 | – | – | – | 2.0 | – | – | – | – | 9.0 |
| Ep 23 | – | – | 7.0 | – | – | – | – | – | 9.0 |
| Ep 24 | 9.0 | – | 7.0 | – | – | – | – | – | 9.0 |
| Ep 25 | – | – | 8.0 | – | – | – | – | – | 9.0 |
| Ep 26 | – | – | 8.0 | – | – | – | – | – | 9.0 |
| Ep 27 | – | – | – | – | – | – | – | – | 9.0 |
| Ep 28 | – | 8.0 | – | – | – | – | – | – | 9.0 |
| Ep 29 | – | – | – | – | – | – | – | – | 9.0 |
| Ep 30 | – | – | – | – | – | – | – | – | 7.5 |
| Ep 31 | – | – | – | – | – | – | – | – | – |
| Ep 32 | – | – | – | – | – | – | – | – | – |
| Ep 33 | – | – | – | – | – | – | – | – | – |
| Ep 34 | – | – | – | – | – | – | – | – | – |
| Ep 35 | – | – | – | – | – | – | – | – | – |
| Ep 36 | – | – | – | – | – | – | – | – | – |
| Ep 37 | – | – | – | – | – | – | – | – | – |
| Ep 38 | – | – | – | – | – | – | – | – | – |
| Ep 39 | – | – | – | – | – | – | – | – | – |
| Season Avg | 8.1 | 7.4 | 6.5 | 3.6 | – | 4.5 | 8.7 | 0.8 | 9.0 |
Ratings Analysis & Trajectory
Across 9 seasons and 271 episodes, Perry Mason has earned an overall series rating of 7.5 out of 10. The series demonstrates an upward quality trajectory, with later seasons sustaining higher viewer acclaim than its debut.
The single highest-rated hour of television in the series is Season 2, Episode 1 ("The Case of the Corresponding Corpse"), rated at an extraordinary 10.0/10 with 1 ratings. Conversely, the lowest-rated installment is Season 8, Episode 21 ("The Case of the Fatal Fetish"), landing at 0.5/10.
The most precipitous single-episode shift occurred in Season 4 between Episode 2 ("The Case of the Credulous Quarry", 8) and Episode 3 ("The Case of the Ill-Fated Faker", 5), a swing of 3 points.
Top 10 Highest Rated Episodes of Perry Mason
| Rank | Episode | Title | Score | Votes | Air Date |
|---|---|---|---|---|---|
| #1 | Season 2, Ep 1 | The Case of the Corresponding Corpse | 10.0 | 1 | Sep 20, 1958 |
| #2 | Season 2, Ep 5 | The Case of the Curious Bride | 10.0 | 1 | Oct 18, 1958 |
| #3 | Season 9, Ep 18 | The Case of the Golfer's Gambit | 10.0 | 1 | Jan 30, 1966 |
| #4 | Season 9, Ep 4 | The Case of the Cheating Chancellor | 9.5 | 2 | Oct 3, 1965 |
| #5 | Season 1, Ep 24 | The Case of the Deadly Double | 9.0 | 1 | Mar 1, 1958 |
| #6 | Season 7, Ep 1 | The Case of the Nebulous Nephew | 9.0 | 1 | Sep 26, 1963 |
| #7 | Season 7, Ep 2 | The Case of the Shifty Shoebox | 9.0 | 1 | Oct 3, 1963 |
| #8 | Season 9, Ep 1 | The Case of the Laughing Lady | 9.0 | 1 | Sep 12, 1965 |
| #9 | Season 9, Ep 2 | The Case of the Fatal Fortune | 9.0 | 1 | Sep 19, 1965 |
| #10 | Season 9, Ep 3 | The Case of the Candy Queen | 9.0 | 1 | Sep 26, 1965 |