Doc Savage was often joined in his adventures by:

William Harper "Johnny" Littlejohn -- the world's greatest living expert on geology and archaeology.

Colonel Johny "Renny" Renwick -- engineering genius he loved to pound his massive fists through heavy doors.

Lieutenant Colonel Andrew Blodgett "Monk" Mayfair -- only 5 feet tall and over 260 pounds. He is a world-renown chemist.

Major Thomas J. "Long Tom" Roberts was the physical unthreatning but a brlliant master of electricity .

Brigadier General Theodore Marley "Ham" Brooks -- slender and sleek and the greatest lawyer Harvard ever produced he never travelled without his black sword-cane.

They would travel anywhere and confront any danger enjoying themselves partly due to the thrill of the adventure as well as to help Doc Savage.