(coexisting on another dimensional plane)
"You. In my universe. Nice to meet you."
Like his prime universe counterpart, Stamets was an astromycologist who experimented with spore drive technology for the benefit of Emperor Philippa Georgiou, in order to create the core which powered the Imperial flagship ISS Charon. However, by this misusing of the technology, he created a disease spreading across the mycelial network. As a result, along with his counterpart, Stamets became trapped in the mycelial plane, falling into a coma, and being held on board the Charon. (DIS: "Vaulting Ambition", "What's Past Is Prologue")
At one point, Stamets had supported Gabriel Lorca's coup against the Emperor; however, he betrayed Lorca, which resulted in the rebels being chased down by Imperial forces. Soon after being awakened from his coma by his joint efforts with his counterpart, Stamets was captured by Lorca, who used Stamets technical skills in his attempt to oust Georgiou and take over the Charon. However, once Lorca felt secure he told Stamets that the danger of keeping him alive now outweighed his usefulness and had him vaporized by Ellen Landry. (DIS: "What's Past Is Prologue")