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In the episode, Rodney McKay (David Hewlett) returns to Earth to pay a visit to his sister, Jeanie (played by Hewlett’s real-life sister, Kate Hewlett).
It is Tapping’s third appearance in the spin-off series, following a brief cameo in Season One’s “Letters From Pegasus” and a guest starring role in Season Two’s “Grace Under Pressure.”
Learn more about “McKay and Mrs. Miller” in GateWorld’s episode guide.