"The Offspring," one of Star Trek: The Next Generation's most memorable, heartwrenching and morality-challenging episodes, aired on March 12, 1990—or 25 years ago tomorrow. The third-season hour, written by Rene Echevarria and directed by Jonathan Frakes, follows Data as he creates, bonds with, teaches, advocates for, struggles to save and then mourns Lal, his android "daughter."

Some interesting facts and anecdotes about "The Offspring":