Star Trek: The Next Generation, "Descent I" and "Descent II"
"Descent I" and "Descent II". Star Trek: The Next Generation. Part I, week of 21 June 1993. Part II, week of 20 Sept. 1993. Alexander Singer, dir. Ronald D. Moore, script. Jeri Taylor, story. Part II, week of 20 Sept. 1993. Alexander Singer, dir. René Echevarria, script. Jonathan Del Arco, Alex Datcher, James Horan, Brian Cousins, guest stars.
End of Part I reveals that Mr. Data's evil twin, Lore, has used the promise of emotion (and humanity?) to tempt Data to join him and the Borg in a campaign against the Federation. Part II shows "Descent" to be a continuation of "I, Borg" (q.v.). See for a serious dramatic use of android robots and cyborgs for a thought experiment on individualism, cooperation, and leadership; dissent, emotion, ends and means, and ethics generally; friendship, family, humanity, freedom—and murder: the fratricide when Data kills Lore (and damages Lore's emotion-chip, which Jordi saves from destruction by Data). Cited, summarized, and commented upon in Cinefantastique 25.5 & 6 (Dec. 1994): 47.