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| Lewis Sirk | |
| Aliases: | Deputy Lewis Sirk |
| Continuity: | Invasion |
| Notability: | Supporting character |
| Type: | Law enforcement |
| Occupation: | Deputy |
| Gender: | Male |
| Race: | Human |
| Location: | Homestead, Florida |
| Status: | Alive |
| First: | "Lights Out" |
| Final: | "The Last Wave Goodbye" |
Lewis Sirk is a fictional law-enforcement officer and a major supporting character featured on the science fiction television series Invasion on ABC. Played by actor Nathan Baesel, he was introduced in the second episode of the series, "Lights Out" and made fifteen appearances in the series in total.