The android Prof. Jonathan Kildare had a tumultuous life before the nuclear war that transformed all humanity into mutants. Now, in a metallic body, and depending of a few batteries that are left. Prof. Kildare began a new project: resurrect humanity and creating the Ex mutants (the reboot version)

He is a counterpart of Dr Cugat from the original Ex-mutants universe, but saner and with a justice-seeking personality. Tragically, he died in the battle against the villain Extreme, when he attacked his universe.