context: After many attempts to expunge the three hostages, they are captured and sent to a dungeon, wherein Johnny finds Dr Edwards and John Bowman kidnapped by Ziska and his cronies.
source: Ziska had been a great surgeon who went mad and began to perform unorthodox operations.
reference_original: Ziska war ein großartiger Chirurg gewesen, der wahnsinnig geworden war und damit begann, unkonventionelle Operationen durchzuführen.
reference_flipped: Ziska war eine großartige Chirurgin gewesen, die wahnsinnig geworden war und damit begann, unkonventionelle Operationen durchzuführen.