Star Trek: Voyager®, "The Killing Game Part I"

'''"The Killing Game Part I." Star Trek: Voyager®.''' Episode 4.17, production 186, 4 March 1998. David Livingston, dir. Brannon Braga and Joe Menosky, script. Videographic information and plot details from and Cinefantastique 30.9/10 (Nov. 1998): 101-02.

"The Hirogen have taken over the U.S.S. Voyager and implanted devices in the crew to make them believe they are characters within the holodecks. [* * *] While Seven is in the sickbay, the Doctor uses one of her Borg implants to create a jamming signal" (startrek.com)—the Doctor also uses one of Seven's implants to communicate with her (Cincefantastique 102), for implants useful as well as pernicious. Part II is episode 4.18, #187. In both Parts, the holodeck simulation is set in Terra's Second World War.