Kenneth D. Taylor
Kenneth D. Taylor wiki was the Canadian ambassador in Iran from 1977 to 1980, "became “the de facto CIA station chief” in Tehran after the U.S. embassy was seized by students on Nov. 4, 1979, and 63 Americans, including the four-member Central Intelligence Agency contingent, were taken hostage...
"Trent University historian Robert Wright, author of Our Man in Tehran, a new account of the incident released today, strongly implies that then-prime-minister Joe Clark insisted Mr. Taylor's spying be kept quiet, fearing a negative political fallout if the Canadian public learned that one of its envoys was a U.S. spook." 
Resources and articles
- Canada's man in Tehran was a CIA spy, theglobeandmail, accessed December 11, 2010.