Commander Will Riker served as then-Captain Jean- Luc Picard’s first officer aboard the U.S.S. Enterprise for 15 years. Nicknamed “Number One” by Picard, Riker turned down multiple opportunities to ascend to the command of his own ship, recognizing how much there was to learn from Picard aboard the Enterprise. Riker eventually left to command the U.S.S. Titan after marrying his longtime shipmate and Imzadi (“beloved”), Deanna Troi.