Prinses Sira (Wandisa Guida) is op weg om te trouwen met de kwaadaardige koning Zagro (Livio Lorenzon ). Zagro wil namelijk haar koninkrijk overnemen. Koning Zagro's geliefde wil het huwelijk verhinderen en probeert Prinses Sira uit de weg te ruimen. Gelukkig is Hercules in de buurt om haar te beschermen.
Nee, helaas is La vendetta di Ursus nog niet beschikbaar op Netflix in Nederland.
| Directing | Luigi Capuano | Director |
| Writing | Marcello Ciorciolini | Screenplay |
| Camera | Oberdan Troiani | Director of Photography |
| Writing | Roberto Gianviti | Screenplay |
| Writing | Giovanni Scolaro | Screenplay |
| Sound | Carlo Innocenzi | Original Music Composer |
| Directing | Gianfranco Baldanello | First Assistant Director |
| Costume & Make-Up | Adriana Cassini | Hairstylist |
| Sound | Mario Del Pezzo | Sound |
| Writing | Marcello Ciorciolini | Story |
| Costume & Make-Up | Antonia Quilici | Costume Design |
| Editing | Antonietta Zita | Editor |
| Production | Giulio Pappagallo | Unit Manager |
| Art | Alfredo Montori | Production Design |
| Crew | Franco Fantasia | Master at Arms |
| Camera | Mario Sensi | Camera Operator |
| Production | Ferdinando Felicioni | Production Manager |
| Production | Augusto Dolfi | Unit Manager |
| Art | Camillo Del Signore | Set Decoration |
| Costume & Make-Up | Duilio Scarozza | Makeup Artist |
| Directing | Nellita Zampieri | Script Supervisor |
| Camera | Luigi Troiani | Assistant Camera |
