| Season | Average Rating | Episodes | Best Episode | Worst Episode |
|---|---|---|---|---|
| 9 | ★ 8.0 | 4 |
★ 8.4
Five Little Pigs
|
★ 7.7
The Hollow
|
| 4 | ★ 8.0 | 3 |
★ 8.5
The ABC Murders
|
★ 7.7
One, Two, Buckle My Shoe
|
| 13 | ★ 8.0 | 5 |
★ 8.6
Curtain: Poirot's Last Case
|
★ 7.2
The Big Four
|
| 12 | ★ 7.9 | 4 |
★ 8.0
Hallowe'en Party
|
★ 7.7
The Clocks
|
| 6 | ★ 7.8 | 4 |
★ 8.0
Hercule Poirot's Christmas
|
★ 7.6
Hickory Dickory Dock
|
| 8 | ★ 7.7 | 2 |
★ 8.0
Evil Under the Sun
|
★ 7.4
Murder in Mesopotamia
|
| 11 | ★ 7.7 | 4 |
★ 7.9
Cat Among the Pigeons
|
★ 7.5
Appointment with Death
|
| 5 | ★ 7.6 | 8 |
★ 8.2
The Chocolate Box
|
★ 7.3
The Underdog
|
| 7 | ★ 7.6 | 2 |
★ 7.9
Lord Edgware Dies
|
★ 7.3
The Murder of Roger Ackroyd
|
| 10 | ★ 7.6 | 4 |
★ 8.0
After the Funeral
|
★ 7.4
Taken at the Flood
|
| 3 | ★ 7.6 | 11 |
★ 7.9
The Mysterious Affair at Styles
|
★ 7.3
The Double Clue
|
| 2 | ★ 7.5 | 9 |
★ 8.1
Peril at End House
|
★ 7.2
The Adventure of the Western Star
|
| 1 | ★ 7.3 | 10 |
★ 7.7
The Dream
|
★ 6.9
The Adventure of Johnnie Waverly
|
