Hercules Unbound # 3 1976 FN+

Hercules Unbound # 3 published by DC Comics in March 1976, features the story "Within the Pit Below," in which Hercules is forced to battle in the realm of Pluto. 

"Within the Pit Below" 

• The Trap: The three-headed hound Cerberus, an agent of the war god Ares, captures Jennifer Monroe (Hercules' companion) to use as leverage against the demigod.
• The Descent: Cerberus coerces Hercules into following him into the underworld, the realm of the god Pluto, to engage in a battle for Jennifer's life.
• The Battle: Within the fiery pits of Hades, Hercules battles the monstrous hound.
• Writer: Gerry Conway
• Penciler: José Luis García-López
• Inker: Wally Wood
• Editor: Joe Orlando
• Characters: The issue features appearances by Hercules, Jennifer Monroe, Kevin, Basil the Dog, and the first appearances of the DC Universe versions of Pluto and Persephone.