The T-Spheres are autonomous mini-drones invented and used by Curtis Holt as Mr. Terrific. The spheres have several offensive and defensive capabilities, such as a self-targeting projectile.


The spheres were developed by Curtis Holt and originally intended for Felicity Smoak's program for "prototypes for the future" when she became CEO of Palmer Technologies.[1]

When Palmer Tech was under attack by Brie Larvan, Felicity and Thea Queen used some T-Sphere prototypes to create an explosion in the boardroom to free the captive board members.[2]

After Felicity was fired, Curtis quit his job at Palmer Tech and joined Team Arrow, where he continued working on the spheres in order to help him fight crime as Mr. Terrific. Although at first they were not functional, by the time the team encountered Vigilante, Curtis used them successfully to knock him out.[3]

Rewritten reality

In the reality created by the Legion of Doom using the Spear of Destiny, the spheres were utilized by Felicity Smoak, who was the last living vigilante in Star City.[4]



DC's Legends of Tomorrow

Season 2

Season 3


  • Curtis named two of his spheres Kodo and Podo.[5]


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