John Cavil

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John Cavil Number One
Battlestar Galactica character
Two copies of the Cavil model
First appearance	"Lay Down Your Burdens" (Part 1) (2006)
Last appearance	Battlestar Galactica: The Plan (2009)
Portrayed by	Dean Stockwell
In-universe information
Species	Humanoid Cylon
Gender	Male
Affiliation	Cylons

John Cavil (Number One) is a fictional character and the main antagonist from the re-imagined Battlestar Galactica television series. He is portrayed by Dean Stockwell. In the fourth-season episode "Six of One", Cavil's model number was revealed as Number One.