Sergio Leone pioneered the Spaghetti Western. Sergio Corbucci and Sergio Sollima made significant contributions to the genre in Leone’s footsteps. When fans think of Spaghettis, those are the three Sergios who usually spring to mind. But there was also a fourth Sergio in the Italian West – Sergio Martino – who directed two interesting entries on his way to bigger fame in other Italian B-movie genres in the late ‘70s and the 1980s with “Slaves of the Cannibal God” and “2019: After the Fall of New York” . . .