In the Fabulous Thirties, Doc Savage and his five Amazing Adventurers are sucked into the mystery of Doc's father disappearing in the wilds of South America. The maniacal Captain Seas tries to thwart them at every turn as they travel to the country of Hidalgo to investigate Doc's father's death and uncover a vast horde of Incan gold.

Ron Ely
as Clark 'Doc' Savage Jr.

Paul Gleason
as Maj. Thomas J. 'Long Tom' Roberts

William Lucking
as Col. John 'Renny' Renwick

Michael Miller
as Lt. Col. Andrew Blodgett 'Monk' Mayfair

Eldon Quick
as William Harper 'Johnny' Littlejohn

Darrell Zwerling
as Brig. Gen. Theodore Marley 'Ham' Brooks

Paul Wexler
as Capt. Seas

Janice Heiden
as Adriana

Robyn Hilton
as Karen

Pamela Hensley
as Mona