| Name | First Aired | Runtime | Image | |
|---|---|---|---|---|
| S01E01 | The Monstrous Plot |
June 10, 1939
|
28 | |
| S01E02 | The Mysterious Friend |
June 10, 1939
|
17 | |
| S01E03 | The Executioner |
June 10, 1939
|
17 | |
| S01E04 | Sabotage |
June 10, 1939
|
17 | |
| S01E05 | The Ray of Death |
June 10, 1939
|
17 | |
| S01E06 | Thirty Seconds to Live |
June 10, 1939
|
17 | |
| S01E07 | The Flooded Mine |
June 10, 1939
|
17 | |
| S01E08 | S.O.S. |
June 10, 1939
|
17 | |
| S01E09 | Ladder of Peril |
June 10, 1939
|
17 | |
| S01E10 | The Infernal Machine |
June 10, 1939
|
17 | |
| S01E11 | The Red Circle Speaks |
June 10, 1939
|
17 | |
| S01E12 |
Flight to Doom
series finale
|
June 10, 1939
|
17 |
No artwork of this type.
No artwork of this type.
No artwork of this type.