- References from numerous sources establish that the various depictions of the mirror universe may not take place in concurrent timelines, meaning there could be a number of divergent alternate reality versions of this topic that do not share the same continuity. The references below this note are separated into subsections to minimize confusion regarding the divergences.
In the mirror universe, William T. Riker was a privateer who was loyal to no one but himself. Riker was born on Luna as the son of Kyle Riker, an abusive father who beat Riker for years. When he was 15 years old, Riker killed his father with a Klingon mek'leth and escaped the Sol System. Riker worked for both the Klingon-Cardassian Alliance and the Terran Rebellion, whichever paid him the most. Riker had a problem with authority, getting furious with anyone who attempted to tell him what to do. He was hired by the Terran Rebellion to help them steal files on the Alliance from Lru-Irr, run by a Bajoran scientist named Jaza Najem. He was partnered with Rebel operatives Ree, Christine Vale and Tuvok. Once the Rebels and Riker reached the files, it was revealed that Vale was actually a Terran operative of the Alliance and that Jaza was her lover. She then proceeded to kill Ree and call in several Klingon and Cardassian soldiers. Tuvok and Riker managed to defeat them; Riker captured Vale and viciously raped and then killed her, before proceeding to abandon the Rebels and leave with Ian Andrew Troi's ship, the Deanna. But while in orbit, Riker was killed when the Deanna was destroyed by Alliance disruptor blasts. (TTN - Mirror Universe short story: "Empathy")
In one permutation of the mirror universe in which the Terran Empire never fell, Commander William T. Riker was a Terran who served in the Imperial Starfleet of the 24th century. In the 2360s, Riker served as first officer aboard the ISS Enterprise-D under the command of Jean-Luc Picard. (TNG novel: Dark Mirror)
- The source material in Dark Mirror contradicts the canon version of the mirror universe in many other ways, including this depiction of a mirror universe where the conflict between Klingons and Terrans ended up opposite compared to canon.
An alternate version of Riker was Emperor Tiberius's commandant of security. Commandant Riker spearheaded the capture of Intendant Spock, who attempted to overthrow Regent Picard's strike into the counterpart universe. In this reality, Riker's face was disfigured as a result of his harsh life—with a large scar from an iopene cutter. (ST novel: Dark Victory)
Q & A
In one possible permutation of the mirror universe which was encountered through a quantum fissure in 2380, Riker served as the first officer of the ISS Enterprise-E, a Terran Empire vessel under the command of Captain Jean-Luc Picard, until he was assassinated by Lore, who succeeded him in that position. (TNG novel: Q & A)
|ISS Enterprise-D personnel|
|Reginald Barclay • Beverly Crusher • Wesley Crusher • Eileen Hessan • Geordi La Forge • Miles O'Brien • Jean-Luc Picard • William T. Riker • Mark Stewart • Deanna Troi • Worf|
|ISS Enterprise-E personnel|
|Reginald Barclay • Lore • Miles O'Brien • Jean-Luc Picard • William T. Riker|