Cover by Jack Kirby/Vince Colletta
"The Evil Menace of Electro!" (X-691) by Lee and Orlando/Colletta. 22 pages.
The Fantastic Four stop by the offices of Murdock and Nelson to have the firm represent them on a lease renewal for their skyscraper headquarters before heading out of town. Daredevil has been making operations difficult for Electro's car theft ring, so Electro ups the ante by breaking into the FF's headquarters while they are away. Daredevil follows him, and keeps Reed Richards design secrets safe.
Reprinted in Marvel Super-Heroes (1967) #22.