8 Best Times X-Men Joined The Avengers

8. Beast

Back in 1976, Marvel was trying to get Henry McCoy into every comic book they possibly could. This included Amazing Adventures, where he would transform into his now familiar blue furry self, as well as any horror title they could think of. But they finally found him a new home with the Avengers, in issue #137.

With Earth's Mightiest Heroes actively seeking out new members, to the point where Thor actually does a public service announcement that informs the world they're hiring, the process doesn't exactly go according to plan.

Most applicants are rejected by Black Panther, Captain America, and Hercules to name just three ,but all is not lost, as Edward G Robinson shows up to claim his place.

It turns out that this is just Beast in disguise and he arrives just in time, as The Stranger attacks the assembled heroes and they have to fight him off. With Thor, Iron Man, Wasp, and Hank Pym all incapacitated by floating mines, it's left to Hank to fight his way through and save the day. Beast would become a key member of the Avengers, Secret Avengers and Illuminati, and he's been brilliant in each of them.