T-Zero is an alternate time-line previously unknown to Time-Rider where John Martin first began his time traveling career. However in this reality he was not a superhero, but was a top secret agent for ATTA and reported personally to FDR himself. His first appearance is in volume 1 of the new Time Cruisers series available now at Amazon. His second appearance was in the short story, Time-Rider: The ATTA Incident where he has a run-in with his alternate time line counterpart Time-Rider. The time line of T-Zero also contains Time-Rider's worst enemy Bastian Wolfe. There seems to be little difference between Wolfe in these two variations. In this time line John Martin frequently teams up with a group of teens and one professor known as the Time Cruisers.