Iron Man #159
| Writer | Roger McKenzie |
| Artist | Paul Smith |
After saving commuters at the Roosevelt Island tramway, Iron Man must investigate a member of his staff. Al Bido, an amnesiac janitor at Stark International, has a flair for complex chemical structures. After seeing the staff psychologist in order to recover his memories, Bido realizes that he is none other than sworn Iron Man enemy, Diablo!
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