UPN airs the 169th episode of Star Trek: Voyager. 
Stardate 54890.7: Captain Janeway and the Doctor take the Delta Flyer to a medical conference, but when Janeway returns she orders Chakotay to prepare to eject Voyager’s warp core…and giving another, more disturbing order, to find an M-class planet suitable for colonization in the Delta Quadrant. Unwilling to accept that the captain is abandoning Voyager’s homeward journey without any explanation, Chakotay confronts her after more suspicious orders are given. Just as Chakotay realizes that Janeway has been replaced by a lookalike, the first officer is attacked and rendered unconscious. More suspicious orders are given to the crew, and Chakotay is also impersonated. But could the saboteur be one of Voyager’s own?
teleplay by Phyllis Strong & Mike Sussman
story by Andrew Shepard Price & Mark Gaberman
directed by Mike Vejar
music by Dennis McCarthyCast: Kate Mulgrew (Captain Kathryn Janeway), Robert Beltran (Chakotay), Roxann Biggs-Dawson (B’elanna Torres), Robert Duncan McNeill (Tom Paris), Ethan Phillips (Neelix), Robert Picardo (The Doctor), Jeri Ryan (Seven of Nine), Tim Russ (Tuvok), Garrett Wang (Ensign Harry Kim), Andy Milder (Nar), Wayne Thomas Yorke (Zet), Alexander Enberg (Vorik), David Sparrow (Alien/Doctor), Tarik Ergin (Tactical), J.R. Quinonez (Overlooker/Doctor)
LogBook entry by Earl Green