Avengers Vol.1 #52
The Black Panther arrives at Avengers Mansion ready to join Earth's Mightiest Heroes! However when T'Challa reaches the main meeting room, he finds his three would-be teammates lying on the floor unconscious! The panther begins to render first aid, but Jasper Sitwell suddenly appears and arrests him for murder! While being transported to and questioned at the local police station, T'Challa puts the evening's strange pieces together! And the newest avenger rushes back to the mansion to face the true perpetrator!
Printed: May 1968
Writers: Roy Thomas
Art: John Buscema and Vince Colletta
Cover: John Buscema