Yoinked from the wikipedia god, 1000 Misspent Hours, and my own bad movie knowledge ...
"Creature of the Walking Dead is a 1965 American film directed by Jerry Warren (March 10, 1925 – August 21, 1988), an American film director, producer, editor, screenwriter, cinematographer and actor. Warren was noted for his involvement in many cult films. He has been described as 'one of cult film's most frustrating and maligned members.'
This confusing film originally started as a 1960 low budget Mexican language film directed by Fernando Cortes called 'La Marca Del Muerto" but low budget auteur Warren purchased the American rights and added new scenes featuring American actors, resulting in this tragic hatchet-job on an otherwise lost Mexican horror film.
Creature of the Walking Dead features astonishingly little conventional dubbing, apparently because Warren didn’t feel like hiring more than one voice-actor of each gender to undertake the task. Warren’s inserted scenes are more than simply meandering, shitty, and incomprehensible. Most of the time during this film, we’re left to make do instead with Martin Malthus expostulating over the scenes in rambling voiceovers, whether he’s even present in the scene or not.
If Fernando Cortes ever met Warren face to face, I hope he gave him a good, hard kick in the shins."
Creature of the Walking Dead by MargaliMorwentari