USA
Emil Bruckner, a young German boy who has been indoctrinated in Nazi propaganda, is sent to live with his mild-mannered American uncle (Academy Award winner Fredric March) in this critically acclaimed World War II classic. Now a rigid proponent of the Third Reich, Emil wreaks havoc on the whole community while his family struggles to counter the insidious Nazi influence. Based on the prize-winning Broadway play, the film remains a fascinating look at the battle between bigotry and tolerance and movingly portrays the personal effects of Hitler's chilling declaration: "Today Germany, Tomorrow the World."
| ...e domani il mondo |  Italy |
| Ángel de maldad |  Mexico |
| Les hommes de demain |  France |
| Morgondagens värld |  Sweden |
| O kosmos tis avrion (transliterated title) |  Greece |
| O Mundo de Amanhã |  Portugal |
| Sementes de Ódio |  Brazil |
| Tomorrow, the World! |  United Kingdom |
| Tomorrow, the World! | USA |
| Завтра - весь мир |  Soviet Union |
 |
Skip Homeier [14] | Emil Bruckner |
|
Marvin Davis [13] | Dennis Butler |
 |
Patsy Anne Thompson [15] | Millie |
|
Voyt Williams Jr. [14] | Undetermined Role (unconfirmed, uncredited) |
|
Rudy Wissler [16] | Stan Dumbrowski - Paperboy |
 |
Joan Carroll [13] | Pat Frame |
 |
Freddie Chapman [13] | Undetermined Role (unconfirmed, uncredited) |
