In the mirror universe, Garner was a member of the Terran Rebellion during the 24th century.
In the 2340s, Garner served aboard the Lakul. At one point, he was tasked with subduing Sestro (who was impersonating Jean-Luc Picard) and was unable to do so. (STA - Mirror Universe- Shards and Shadows short story: "The Traitor")
- It is unknown whether or not Garner has a counterpart in the primary universe.