This episode opens on a note of exultation, as B'Elanna Torres (Roxann Dawson) and Tom Paris (Robert Duncan McNeill) learn they are going to have a baby. Joy turns to anguish when Torres discovers that the baby will likely have dominant Klingon features. Manipulating the mind of the Doctor (
Robert Picardo), Torres tries to force him to change her unborn child's DNA, leading to a remarkable and unexpected denouement. "Lineage" made its U.S. TV debut on January 24, 2001. ~ Hal Erickson, All Movie Guide