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Robert Moloney played Professor Alistair Gryffen in K9.
He also made appearances in such science fiction series as Stargate SG-1, The Outer Limits, Smallville, The X-Files, and The Twilight Zone. Originally from Calgary, Alberta, Moloney was the first Canadian actor to have an ongoing role in a Doctor Who-related series, and his character was the first Canadian in an ongoing role.