Professor Freuhoffer is the scientist was imprisoned by The Nazi Colonel named Kommandant Moebius.
Professor Freuhoffer has a fixation on dolls and working on the "resurrection machine" and working for Moebius to develop a machine that can reanimate the dead. The seductive Uschi, a Nazi, tries to motivate the doctor only to be interrupted by Moebius. He demands a demonstration of the machine. He brings in a Japanese man and slits his throat. The machine makes him walk for a moment only for him to decay and fall down.
Freuhoffer promises to fix the machine. Moebius reminds him that if he doesn't, his daughter will be killed. Moebius presents him with Tunneler to study. He begins to reverse engineer Tunneler, after the Nazis captured it. In the hopes that he may prove useful for the German war machine. Freuhoffer is examining Tunneler when Uschi enters and tries to again seduce him. Moebius enters and in a rage shoots Uschi through the head.
Freuhoffer tries using the fluid he extracted from Tunneler in his machine to revive Uschi but it fails. Moebius proceeds to have the scientist under his command. He created 4 Nazi Puppets: Bombshell, Weremacht, Blitzkreig and Kamikaze. Freuhoffer tells Kamikaze to detonate, destroying the lab and killing Moebius. After the fight was over, he leaves with a bottle of the puppets' fluid.
One year later Freuhoffer was still living in America, hiding in a hotel with his Nazi puppets. Doctor Gerde Ernst tracked down his location and killed him, then she proceeded to steal the elixir and his puppets from him.
Among Doctor Freuhoffer's dolls is Freakshow's robotic baby, the Zuni killing doll and Retro–Tunneler's head from Killjoy 4, Trilogy of Terror and Retro-Puppetmaster.