"Take the disappearance of a key British Intelligence Officer in Gibraltar, loaded with top secrets. Add a tough, down-on-his-luck ex-CIA agent with a murky past. Try a drop of blackmail. Garnish with two beautiful women. Sprinkle liberally with murder, treachery and mayhem. Stir well till it all fizzes with danger and excitement that is Tangier. The result is a thriller that will grip you down to the last explosive moment. It's the thriller of the year. It's Tangier."
from the cover of the Linked Ring VHS release 1982.