1. "The Secret of the Captive Cavemen" (Superman, Batman and Robin) written by Bill Finger, penciled and inked by Jim Mooney. The trio chase an alien and travel back in time to prehistory. Reprinted in World's Finest Comics #206 and Showcase Presents: World's Finest #2.
2. "Little Pete" gag strip by Henry Boltinoff.
3. "Build Your Own Universe" one page full text story written by Unknown.
4. "The Secret Face of Funny-Arrow!" (Green Arrow & Speedy) written by Ed Herron, penciled and inked by Lee Elias. Reprinted in Showcase Presents: Green Arrow #1.
5. "Peter Puptent Explorer" gag strip by Henry Boltinoff.

Notes:

• Superman, Batman and Robin travel 50,000 years into the past.
• Squirt Gun Arrow, combined Rope-Boomerang and Balloon Arrow, Messenger-Pigeon Arrow, Jack-in-the-Box Arrow, Vacuum Arrow and Balloon Arrow used by the villain Funny Arrow.
• Boxing Glove Arrow used by Green Arrow.