For those unaware, Curtis Holt is loosely based on DCs Michael Holt; a character better known as the hero Mister Terrific. A key component to Mister Terrific is whats known as his T-Spheres. During Restoration, we were given what appeared to be Arrows take on the famed T-Spheres as Felicity finds Curtis working on a sphere-like object that just so happens to be engrained with a T. As he puts it, this is an autonomous communication device that just so happens to randomly explode. In the comic book realm, T-Spheres are often used to fire lasers, create holograms, connect electrical devices, and even to make Mister Terrific appear to fly. With that noted, itll be interesting to see how the show chooses to incorporate T-Spheres going forward, although at the moment the Curtis Holt character is almost being positioned as Arrows take on Batmans Lucius Fox rather than becoming his own hero just yet.