First issue of series, even though the cover says issue #13. Weird Fantasy continued its numbering from E.C.'s title 'A Moon, A Girl' #12, starting its numbering with issue #13. Weird Fantasy re-set to standard numbering as of the sixth issue (#6), but the first five issues are numbered #'s 13, 14, 15, 16 & 17. This created the problem of the series having two issue numbers 13, 14, 15, 16 & 17 which can only be distinguished by their publishing dates.
"Am I Man or Machine?"
"Only Time Will Tell"
"The Men of Tomorrow"
"...Trip Into the Unknown"