Showcase (1956-) #20

“PRISONERS OF 100 MILLION B.C.” Featuring the origin and first appearance of Rip Hunter! Having finished work on Time Sphere II, Rip Hunter and Jeff Smith take a trip back to the Mesozoic era!

Written By:
Henry Boltinoff, Jack Schiff, Jack Miller
Pencils:
Henry Boltinoff, Bernard Baily, Ruben Moreira, Russ Heath
Inks:
Henry Boltinoff, Bernard Baily, Ruben Moreira, Russ Heath
Cover By:
Bob Brown