Frank Hardy (31 Episodes)

Joe Hardy (31 Episodes)

Callie Shaw (31 Episodes)

Biff Hooper (31 Episodes)

Chet Morton (31 Episodes)

Trudy Hardy (31 Episodes)

Phil Cohen (19 Episodes)

Wilt (16 Episodes)

Gloria Estabrook (15 Episodes)

JB Cox (14 Episodes)

Fenton Hardy (13 Episodes)

Jesse Hooper (13 Episodes)

Lucy Wayne (10 Episodes)

Belinda Conrad (10 Episodes)

Mr. Munder (10 Episodes)

Stefan (8 Episodes)

Tall Man (8 Episodes)

Mrs. Khan (8 Episodes)

Angela Todd (8 Episodes)

Donald Dukay (8 Episodes)

Laura Hardy (7 Episodes)

Ezra Collig (7 Episodes)

Stacy Baker/Anastasia Nabokov (7 Episodes)

George Estabrook (7 Episodes)

Jesse Hooper (7 Episodes)

Dennis Gilroy (7 Episodes)

Mack Malone (7 Episodes)

Sam Peterson (6 Episodes)

Fenton Hardy (6 Episodes)

Con Riley (6 Episodes)

George Estabrook (6 Episodes)

Brian Conrad (6 Episodes)

Desk Sergeant (4 Episodes)

Dean McFarlane (4 Episodes)

Lola Burton (4 Episodes)

Vivian Burelli (4 Episodes)

Student (uncredited) (4 Episodes)

Nurse Cody (4 Episodes)

(3 Episodes)

Nigel (3 Episodes)

Rupert Khan (3 Episodes)

Stacy's Aunt (3 Episodes)

Stacy's Uncle (3 Episodes)

Olivia Kowalski (3 Episodes)

Vanessa Bender (3 Episodes)

Ms. Kane (3 Episodes)

(3 Episodes)

Emma (2 Episodes)

Shawna Mayer (2 Episodes)

Ern Cullmore (2 Episodes)

Anya Kowalski (2 Episodes)

Miss Collins (uncredited) (2 Episodes)

Teacher (2 Episodes)

Sergei Nabokov (2 Episodes)

Ahmed Khan (2 Episodes)

Younger Gloria (2 Episodes)

Tom Elroy (2 Episodes)

Tiffany Cohen (2 Episodes)

Rosegrave Academy Student (uncredited) (2 Episodes)

Student at dance (uncredited) (2 Episodes)

Sandra (1 Episodes)

Aucoin (1 Episodes)

Bill Cullmore (1 Episodes)

Captain (1 Episodes)

Fisherman #2 (1 Episodes)

Cory (1 Episodes)

Police Officer (1 Episodes)

Flight Attendant (1 Episodes)

Man in Black (1 Episodes)

Balloon Game Master (1 Episodes)

Ring Toss Game Master (1 Episodes)

Billy (1 Episodes)

Orderly (1 Episodes)

Librarian (1 Episodes)

Nurse (1 Episodes)

Phone Booth Man (1 Episodes)

Tan Likely (1 Episodes)

Rosegrave Candidate (1 Episodes)

Adams (1 Episodes)

Guard (1 Episodes)

Mr. Dukay (1 Episodes)

Cranky Assistant (1 Episodes)

Ana Diaz (1 Episodes)

Paramedic (uncredited) (1 Episodes)

Hard-Looking Man (1 Episodes)

Sonya (uncredited) (1 Episodes)

Young Laura (1 Episodes)

Vanessa Bender (1 Episodes)

Tad Carson (1 Episodes)

Steve Shaw (1 Episodes)

Erica (1 Episodes)

Demon Masked Intruder (1 Episodes)

Hotel Clerk (1 Episodes)

Nurse (1 Episodes)

Professor (1 Episodes)

Richards (1 Episodes)

Goon (uncredited) (1 Episodes)

Mayor Krassner (1 Episodes)

Young Gloria (1 Episodes)

Stavros Vasili (1 Episodes)