Fantastic Four #15 (1963)

Fantastic Four #15 (1963) sees our beloved heroes receive a red alert signal from their headquarters, prompting them to investigate. Upon reaching the Baxter Building, they find no emergency. Mr. Fantastic has received intelligence of a national mob gathering in New York City. Meanwhile, the Thinker meets with some of the gang leaders, promising to create a kingdom of crime. Although some gangsters doubt the Thinker's abilities, he demonstrates his power by making one of them get captured by the police eighteen seconds later. The Thinker sets his sights on getting rid of the Fantastic Four, splitting them up by offering them various deals. Eventually, the Thinker takes over the Baxter Building and creates an android using Mr. Fantastic's notes. But the Fantastic Four make it to the top floor and defeat the Thinker. Thanks to Mr. Fantastic's quick thinking, the Fantastic Four's weaponry is deactivated, and the Thinker is arrested. This Fantastic Four issue is a classic, showcasing the team's unity, wit, and resilience in the face of adversity.