Cardassian spy infiltrating Voyager's crew.
Cardassian spy who infiltrated Voyager, betraying Chakotay and the crew for Kazon interests, resulting in captivity and loss.
Janeway faces a direct threat to ship security from Seska, whose espionage undermines trust and operational safety.
Tuvok systematically dismantles Seska's covert operations to safeguard ship security.
Chakotay confronts Seska's deception while protecting crew integrity from internal sabotage.
Covert infiltration threat intersecting with automated medical and operational systems.
Operations officer and suspected infiltrator existing in a state of mutual suspicion.
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