Santo contra los zombies (1961)

Definitely the worst (okay, I'll rephrase: only boring) Santo movie I've seen so far. The plot about mind controlled robbers (the "zombies" of the title) is as inane as one could hope for, but... there's not enough goofiness or fun to keep the viewers awake and - worst of all - there isn't really a lot of El Santo outside the wrestling scenes.
It's like watching an old American serial without hero, villain and cliffhangers.