| Episode cast overview, first billed only: |
 | Rade Serbedzija | - | Nikola Tesla |
 | Ljuba Tadic | - | John Pierpon Morgan (as Ljubo Tadic) |
 | Svetlana Bojkovic | - | Catherine Johnson |
| Zlatko Crnkovic | - | Ben Johnson |
| Slavko Simic | - | Mark Twain |
| Boris Buzancic | - | Thomas Alva Edison |
| Danilo 'Bata' Stojkovic | - | George Westinghouse (as Danilo Stojkovic) |
| Miodrag Radovanovic | - | Bachelor (as Miodrag Radovanovic-Mrgud) |
| Ivo Serdar | - | Kolman Czito (Teslin asistent) |
 | Miljenko Brlecic | - | Julius Czito (Teslin asistent) |
| Dragan Milivojevic | - | Adams |
| Miro Segrt | - | Tajnik J. P. Morgana |
 | Spiro Guberina | - | John |
 | Mustafa Nadarevic | - | Fred |
| Petar Bozovic | - | Sava Kosanovic |
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