Although officially Canadian, many of the show's writers and directors were American (as was the series creator/script supervisor Abraham Polonsky), with some British contributors as well (such as Ian McLellan Hunter and Donald James).
It was the most expensive series produced in Canada to that time with a total cost of $3 million ($12.9 million today), and although it did well enough for the CBC in terms of viewers, a hoped-for sale to American network television never happened because the series was shot in black-and-white, and U.S. network shows by that time were increasingly being made in color (with fewer and fewer exceptions).
Only the two final two-part episodes of Seaway, "Don't Forget to Wipe the Blood Off" and "Gunpowder and Paint," were filmed in color.
He is assisted by Department of Transport agent retired Admiral Leslie Fox (Austin Willis), and the special police force patrolling the Saint Lawrence Seaway.
A pair of episodes (Don't Forget to Wipe the Blood Off) were edited together into a feature film entitled Affair with a Killer.