First issue of series, even though the cover says issue #12. Weird Science continued its numbering from 'Saddle Romances' #11, starting its numbering with issue #12. Weird Science re-set to standard numbering as of the fifth issue (#5), but the first four issues are numbered #'s 12, 13, 14, & 15. This created the problem of the series having two issue numbers 12, 13, 14, & 15, which can only be distinguished by their publishing dates.
"Lost in the Microcosm"
"Dream of Doom"
"Experiment...in Death"
"Things from Outer Space"