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 |
| Writing | Roberto Gianviti | Screenplay |
| Writing | Giovanni Scolaro | Screenplay |
| Camera | Oberdan Troiani | Director of Photography |
| Sound | Carlo Innocenzi | Original Music Composer |
| Costume & Make-Up | Adriana Cassini | Hairstylist |
| Camera | Luigi Troiani | Assistant Camera |
| Editing | Antonietta Zita | Editor |
| Art | Alfredo Montori | Production Design |
| Directing | Gianfranco Baldanello | First Assistant Director |
| Directing | Nellita Zampieri | Script Supervisor |
| Sound | Mario Del Pezzo | Sound |
| Production | Augusto Dolfi | Unit Manager |
| Costume & Make-Up | Duilio Scarozza | Makeup Artist |
| Production | Ferdinando Felicioni | Production Manager |
| Art | Camillo Del Signore | Set Decoration |
| Costume & Make-Up | Antonia Quilici | Costume Design |
| Crew | Franco Fantasia | Master at Arms |
| Camera | Mario Sensi | Camera Operator |
| Writing | Marcello Ciorciolini | Story |
| Production | Giulio Pappagallo | Unit Manager |
