(Introduction by Harry Harrison)
I Always Do What Teddy Says
Space Rats of the CCC
Down to Earth
A Criminal Act
Famous First Words
The Pad
If - (original title = "Praiseworthy Saur")
Mute Milton
Simulated Trainer - (original title = "Trainee for Mars")
At Last, the True Story of Frankenstein
The Robot Who Wanted to Know
Bill the Galactic Hero's Happy Holiday

"Bill the Galactic Hero's Happy Holidayl" (21 pages) is original to this collection. The rest are from 1958 to 1974 - originally appeared in Fantastic Universe, Amazing, Ellery Queen's, Magazine of F&SF, Science Fantasy, Analog, If, Prime Number, Final Stage.