If one of the zombie heads used in last night's episode of The Walking dead looked familiar its probably because one of them was a mold of actor Johnny Depp's head. The show's executive producer Greg Nicotero spilled the beans about using the 'Pirates of the Caribbean' star's noggin as a sculpt for one of the severed heads, saying, "I think we had sculpted an emaciated version of a dummy head for something and we used Johnny Depp?s head as a basis just for a clay sculpt. I laughed so hard when we shot that scene."