"Hive Mind" planet was an uncharted world home to a Hive Mind Bacteria and was visited by Lyta Alexander and Citizen G'Kar in 2262.[1]
The native bacteria responded to any colonization attempts of the planet by imposing its telesymbiosis on the aliens, making them lost in telepathic illusion and eventually starving to death. This cycle kept up until 2262 when Lyta Alexander and G'Kar arrived on the world, tracking the course of an abandoned Psi Corps mothership. Eventually seeing through the illusion, Alexander, with her enhanced abilities, was able to overload the bacteria's neural links, effectively crippling the "hive mind".