The show was created by Donald P. Bellisario. The first three seasons star Jan-Michael Vincent, Ernest Borgnine, Alex Cord, and (from the second season onwards) Jean Bruce Scott. After the original series was cancelled, a fourth season, with an entirely new cast and on a much smaller budget, was filmed in Canada for the USA Network.
The full 50 second narration, as spoken by actor Lance LeGault, is as follows: "This briefing is from file A56-7W, classified top secret. Subject is Airwolf, a mach one plus attack helicopter, with the most advanced weapons systems in the air today. It has been hidden somewhere in the Western United States by it's test pilot, Stringfellow Hawke. Hawke has promised to return Airwolf only if we can find his brother, Sin Jin, an MIA in Vietnam. We suspect that Archangel, deputy director of the agency that built Airwolf is secretly helping Hawke in return for Hawke flying Airwolf on missions of National concern. Stringfellow Hawke is 34, a brilliant combat pilot, and a recluse since his brothers disappearance. His only friend is Dominic Santini, who's air service is the cover for their government work. With Hawke and Santini flying as a team at speeds rivaling the fastest jets, backed by unmatched firepower, Airwolf is too dangerous to be left in unenlightened hands. Finding it is your first priority. End of file."