Writing Credits (in alphabetical order)
| Jan de Hartog | ... | (play) |
Cast
 |
John Ainsworth | ... | Doctor Karels |
| Kenneth More | ... | Doctor Wilts | |
| Rene Ray | ... | Yolan (as René Ray) | |
|
|
Wilfred Walter | ... | Professor Wouterson (as Wilfrid Walter) |
Produced by
| George More O'Ferrall | ... | producer |
