Character guide

Frank Hardy

major

Also known as Frank, Miss Todd Frank Hardy

One of the teenage brother detectives investigating the mystery of the caves.

Joe Hardy

major

Also known as Joe, Hardy

Frank's younger brother and fellow detective, brave and impulsive.

Chet Morton

supporting

Also known as Chet, the bashful Chet

The Hardy boys' friend, often hungry and cautious but loyal.

Biff Hooper

supporting

Also known as Biff

A friend of the Hardys, athletic and dependable.

Fenton Hardy

supporting

Also known as Mr. Hardy, Dad

The boys' father, a renowned private detective.

Miss Evangeline Todd

supporting

Also known as Miss Todd, Evangeline Todd, Todd

A woman seeking help to find her missing brother Todham Todd.

Todham Todd

supporting

Also known as Professor Todham Todd, Todham, Professor Todd

A missing professor and brother of Miss Todd, central to the mystery.

Captain Royal

major

Also known as Captain Royal Todham Todd, the captain

A mysterious old sailor living near the caves with a hidden past.

Carl Schaum

supporting

Also known as Carl, Schaum, The Prisoner Carl Schaum

A prisoner and suspect involved in the cave mystery.

Tony Prito

minor

Also known as Tony

A friend of the Hardys who helps with boating and adventures.

Mr. Simms

minor

Also known as Simms

A local man who interacts with the Hardys during their investigation.

Iola Morton

minor

Also known as Iola

Chet's sister and a friend of the Hardy boys.

Mr. Jacobson

minor

Also known as Jacobson

A character encountered during the Hardys' travels.

Mrs. Hardy

minor

The boys' mother, supportive and caring.

Lieutenant Patwick

minor

Also known as A certain Lieutenant Patwick, Patwick

A military officer mentioned in connection with the mystery.

Callie Shaw

minor

Also known as Callie

A friend of the Hardy boys, often accompanying them.