Introduced on Star Trek: The Next Generation, Lt. Commander Data (Brent Spiner) quickly became one of Star Trek’s most interesting and beloved characters. An advanced one-of-a-kind android, Data served as the operations officer aboard the USS Enterprise-D under the command of Captain Jean-Luc Picard (Patrick Stewart). Data’s universal kindness and childlike sense of wonder made him difficult to dislike, and he remains an important part of modern Star Trek. Brent Spiner’s nuanced performance helped make Data stand out among TNG’s incredibly strong cast, and his quest to be human became one of TNG’s best ongoing storylines.

https://screenrant.com/star-trek-data-complete-timeline-tng-picard-explainer/