Danger Room #4: The Brotherhood of Evil Mutants!
The X-Men #4 from March 1964 …
Danger Room #3: Beware of the Blob!
The X-Men #3 from January 1964 …
Danger Room #2: No One Can Stop the Vanisher!
The X-Men #2 from November 1963 …
Danger Room #1: X-Men
The X-Men #1 from September 1963 …