Hector, the dog of an officer of the merchant navy, wanders during a stopover in Lisbon. Captured by smugglers, he is soon used as a mule in a case of diamond smuggling. But this is not counting on his innate sense of justice and law...
| Actor | Role |
|---|---|
 Guy StockwellMax | Max |
 Craig HillBill | Bill |
 Walter GotellBenton | Benton |
 Edmund HashimDuke | Duke |
 Ed McCreadyAdolph | Adolph |
 Eric PohlmannHugo | Hugo |
 Fortunio BonanovaInspector | Inspector |
 Henry BrandonCircus Roustabout | Circus Roustabout |
| PPaul DevlinCrew Member | Crew Member |
 John StacyCaptain | Captain |
| SStephen LevyCrew Member | Crew Member |
| LLina VolonghiWoman | Woman |
| AAdelaide RibeiroPortuguese Singer | Portuguese Singer |
| MMário SantosCustoms Officer | Customs Officer |
| SStephen ChiuChinese Man | Chinese Man |
| JJim DolenCaptain | Captain |
| TTony DoonanWireless Operator | Wireless Operator |
| JJokyl Bengal IIHector | Hector |