Doctor Doom wanted to get revenge on Spider-Man, who had rejected his alliance offer. Wanting to find Spider-Man, Doom built the Spider-Finder, a hand-held device receiving the impulses that spiders and spider-related beings gave off. That allowed Doom to scan the whole city, looking for the strongest impulses within the range, until he could find Spider-Man even if the latter was not wearing his disguise.
The device led Doom to the position of Spider-Man, in his civilian clothes as Peter Parker. In close vicinity, however, was Parker's classmate Eugene "Flash" Thompson, disguised as Spider-Man to play a prank on Parker. This led to Doom mistakenly believing that Thompson was the real Spider-Man. Doom easily kidnapped Thompson, releasing him only later when the Fantastic Four tracked him to his lair. Doom left the spider-finder in the lair, where it apparently remained for years.
Item name revealed in Machines of Doom.
- 2 Appearances of Spider-Finder
- Minor Appearances of Spider-Finder
- Media Spider-Finder was Mentioned in
- 1 Images featuring Spider-Finder
- Item Gallery: Spider-Finder