Carter and Deputy Andy run into trouble when the town's communication system breaks down on Eureka. "Double Take" is the 12th episode of the show's fifth season.
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Eureka Season 5 Episode 12 Quotes

Zane: I knew Jo was off, but not THAT off!
Fargo: Tell me about it, my resurrected girlfriend is the Manchurian Candidate.

Zane: You're telling me that Carter, Henry, and Jo are all evil clones made by Holly?
Fargo: Technically they are programed intelligences in bioprinted bodies, but yeah - evil clones.