Sergeant Preston of the Yukon
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A fictional character from a long-running radio and TV series about a Royal Canadian Mounted Police officer in the Yukon. Frasier alludes to this with 'Sergeant Niles of the Yukon.'
↗ Read on WikipediaAppearance
Mentioned once in Breaking The Ice.
Breaking The Ice
Season 2 · Episode 20 · S02E20
“this whole "Sergeant Niles of the Yukon" act”