Star Trek: The Next Generation S03 E16 The Offspring

"New stars. New stories. New worlds to explore."

Stardate: 43657.0. Data becomes a father when he creates a Soong-type android in the form of a daughter named Lal. Issues are complicated when Lal starts showing signs of a more evolved consciousness, including the ability to feel emotions, which attracts the attention of Starfleet scientists who want to take her away from Data and examine her advanced systems.