Issue: #6
"The Return of the Composite Superman!" Reprinted from World's Finest Comics #168."The Testing of Robotman!" Reprinted from The Marvel Family #89.
Creators: Cary Bates, George Klein, Curt Swan, Ernie Chan, Kurt Schaffenberger
Characters: Batman, Dick Grayson, Superman, Billy Batson, Freddy Freeman, Brainiac 5, Cosmic Boy, Mary Marvel, Saturn Girl, Aunt Harriet, Professor Edgewise, Composite Superman