Stardate: 43872.2. The crew are shattered by the apparent death of Data in a shuttle explosion, and are prevented from carrying out a detailed investigation when Starfleet gives them orders for a new mission elsewhere. However, the crew don't realize that he was actually abducted and placed on display as part of a collection of rare and valuable items held by a disreputable character.
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.
Stardate: 43625.2. A rift in the space/time continuum brings the U.S.S. Enterprise - C forward into the 24th Century, and alters the timeline. In this future, the Federation is at war with the Klingons, Tasha Yar is on the bridge, Worf did not join the Federation, and only Guinan's unique perception of reality may restore the timeline.