Captain William T. Riker is a human male, who served as the Federation flagship Enterprise-D's executive officer under Captain Jean-Luc Picard. As the vessel's first officer, Riker was offered his own command numerous times, but repeatedly turned them down in favor of remaining aboard the Enterprise, admitting to Picard in Star Trek Generations that he had always hoped he would take command of the Galaxy class starship. Following the destruction of the Enterprise-D, Riker transferred to its successor, the Enterprise-E, with Picard, and continued to serve as first officer for a continuing number of years, helping to defend Earth against the Borg, prevent the illegal relocation of the Ba'ku and destroy the Reman warbird Scimitar. Shortly before the Scimitar's destruction, Riker married his off-and-on lover, Deanna Troi, who thereafter transferred to the Titan with him to serve as the vessel's counsellor and chief diplomatic officer.