In 1950, the sequence of Western themes was suddenly broken off by a most unexpected novelty: the four issues of the strip dedicated to "L'uomo ombra". Diabolik had not yet seen the light (and indeed would not be on sale at news-stands until twelve years later) when France was thrown into turmoil by the heinous crimes of a scientist, a genius for disguises: a ruthless criminal prepared to go to any lengths in order to continue his experiments. His adversaries, cleverly depicted by Lino Jeva, are detective Barlier and the journalist Sanders, who put an end to the machinations plotted by the Uomo Ombra and his assistant Otto Schwartz, arresting them in India after a series of hair-raising chases, great escapes and dramatic turnarounds. What awaits the Uomo Ombra, upon his return to France, is the guillotine. Rich in allusions to the Fantômas literary series, the album proved to be too far ahead of its time and achieved little success, despite the magnificent cover designs, which were the work of Aurelio Galleppini in sparkling form.