Star Trek: Voyager (1995)

S01E13 Faces

Title: Duality Plot: Stardate: 48784.2. During an away mission, the Vidiians seize Paris, Torres, and Durst. Torres is brought to a laboratory where a disturbing experiment occurs, resulting in her being divided into two distinct beings: one retains her human traits, while the other embodies her Klingon heritage.