• Starring: Shaun Cassidy (Joe Hardy), Parker Stevenson (Frank Hardy)
• Also Starring: Lisa Eilbacher (Callie Shaw), Edmund Gilbert (Fenton Hardy), Edith Atwater (Aunt Gertrude)
• Guest Stars: Roger Davis (Sonny / Will), Simon Scott (Man), Richard Kiel (Manager), Jim Antonio (Rigby)
• Co-Starring: John Kerry (Stratton), George Murdock (Officer Harlen), Lew Brown (2nd Officer)
• With: Bonnie Ebsen (Madge), Dick Ryal (Head in Crystal Ball), Reggie Nalder (The Man)
• Written By: Glen A. Larson
• Directed By: Glen A. Larson

• Starring: Pamela Sue Martin (Nancy Drew)
• Also Starring: George O'Hanlon Jr. (Ned Nickerson), Jean Rasey (George Fayne)
• And: William Schallert (Carson Drew)
• Guest Stars: Monte Markham (Professor Jack Wall), Robert Karnes (Sheriff King)
• Co-Starring: Arthur Peterson (Old Man Jensen), Skip Ward (2nd Agent)
• With: Joe Penny (Brandon), Ron Nyman (1st Agent)
• Written By: Glen A. Larson
• Directed By: E.W. Swackhamer

• Starring: Shaun Cassidy (Joe Hardy), Parker Stevenson (Frank Hardy)
• Also Starring: Lisa Eilbacher (Callie Shaw), Edmund Gilbert (Fenton Hardy)
• Guest Stars: Marc Vahanian (Simon), Bert Kramer (Steve Donner), Sandy Ward (Captain Maguire)
• Co-Starring: Gary Springer (Chet Morton), Dimitra Arliss (Hazel Thompson), Brad Trumbull (Sheriff Andrew Houghton), Bill Quinn (Andy Hudson)
• Written By: Michael Sloan
• Directed By: Ronald G. Satlof

• Starring: Pamela Sue Martin (Nancy Drew)
• Also Starring: George O'Hanlon Jr. (Ned Nickerson), Jean Rasey (George Fayne)
• And: William Schallert (Carson Drew)
• Guest Stars: Brian Byers (Morgan), Phillip R. Allen (Everett), Len Lesser ()
• Co-Starring: Robert Karnes (Sheriff), Gordon Jump (Officer Hooper)
• Written By: Robert Pirosh
• Directed By: Noel Black

• Starring: Shaun Cassidy (Joe Hardy), Parker Stevenson (Frank Hardy)
• Also Starring: Lisa Eilbacher (Callie Shaw), Edmund Gilbert (Fenton Hardy), Edith Atwater (Aunt Gertrude)
• Guest Stars: Marj Dusay (Dr. Janice Craddock), Robin Chesler (Marcia Collins), Howard Platt (Taber)
• Special Guest Star: David Opatoshu (Professor Desmond)
• Co-Starring: Sam Gilman (Mr. Hodges), Alex Rodine (Blasovich)
• With: Henry Gayle Sanders (Guard), Jack Schultz (Lieutenant Oates), Michael Salcido (Technician), Michael Swan (Officer)
• Written By: Larry Alexander
• Directed By: Fernando Lamas

• Starring: Pamela Sue Martin (Nancy Drew)
• Also Starring: George O'Hanlon Jr. (Ned Nickerson), Jean Rasey (George Fayne)
• And: William Schallert (Carson Drew)
• Guest Stars: Queenie Smith (Lela), Irene Tedrow (Ruby), Archie Johnson (Dinko Warner), John Carter (Walter Tobin)
• Co-Starring: Barbara Collentine (Sylvia), Mary Jo Catlett (Dora)
• Teleplay By: Keith A. Walker & Glen A. Larson
• Story By: Keith A. Walker
• Directed By: Michael Caffey

• Starring: Shaun Cassidy (Joe Hardy), Parker Stevenson (Frank Hardy)
• Also Starring: Lisa Eilbacher (Callie Shaw), Edmund Gilbert (Fenton Hardy), Edith Atwater (Aunt Gertrude)
• Guest Stars: Rick Nelson (Tony Eagle), John Pleshette (Carl Fry), Robert Sampson (Lou Haskell), Herbert Voland (Chief Collig)
• Co-Starring: Deirdre Berthrong (Leslie Johnson)
• With: Ned Van Zandt (Richard Johnston), Geoff Parks (Ticket Taker)
• Written By: James Henerson
• Directed By: Ivan Dixon

• Starring: Pamela Sue Martin (Nancy Drew)
• Also Starring: George O'Hanlon Jr. (Ned Nickerson), Jean Rasey (George Fayne)
• And: William Schallert (Carson Drew)
• Guest Stars: Carl Betz (Alex Richmond), Victor Buono (Seth Taylor), Bob Crane (Danny Day), Dina Merrill (Thelma March), Pippa Scott (Janet Mustante)
• Co-Starring: Robert Karnes (The Sheriff), Peter Brandon (The Director), Bob Golden (1st Reporter)
• Teleplay By: Glen A. Larson & Michael Sloan
• Story By: Glen A. Larson & Michael Sloan & Larry Alexander
• Directed By: Jack Arnold

• Starring: Shaun Cassidy (Joe Hardy), Parker Stevenson (Frank Hardy)
• Also Starring: Lisa Eilbacher (Callie Shaw), Edmund Gilbert (Fenton Hardy), Edith Atwater (Aunt Gertrude)
• Guest Stars: Dick Gautier (Tail Gunner), Ken Swofford (Captain)
• And: Penny Peyser (Suzie Wilkens)
• Co-Starring: Josh Taylor (Quentin Miles), Paul Tulley (Thug), Walt Davis (Eric Litton)
• And: Gary Springer (Chet Morton)
• With: Judith Doty (Administrator), Janet Curtis (Marisa)
• Written By: Gregory S. Dinallo
• Directed By: Michael Caffey

• Starring: Pamela Sue Martin (Nancy Drew)
• Also Starring: George O'Hanlon Jr. (Ned Nickerson), Jean Rasey (George Fayne)
• And: William Schallert (Carson Drew)
• Guest Stars: Craig Littler (Vince), A Martinez (Henry Salazar), Susan Pratt O'Hanlon (Ann), Robert Alda (Robert Jordan), Marjorie Lord (Clara Jordan)
• Special Guest Star: Beverly Garland (Thelma)
• Co-Starring: Robert Englund (Gar), Jamie Lee Curtis (Mary), Migdia Varela (Maria)
• With: Robert Karnes (Sheriff), Hanna Hertelendy (Fortune Teller)
• Written By: Lou Shaw
• Directed By: Noel Black

• Starring: Shaun Cassidy (Joe Hardy), Parker Stevenson (Frank Hardy)
• Also Starring: Lisa Eilbacher (Callie Shaw), Edmund Gilbert (Fenton Hardy), Edith Atwater (Aunt Gertrude)
• Guest Stars: Shelly Novack (Wally Siebert), James Shigeta (Kapala), Bruce Gordon (), Roger Bowen (), Lisa Reeves (Becky), Debbie Clinger (Liz), Frank Michael Liu (Lieutenant Kirk), Titus Napoleon (Lew), Richard Narita (Desk Clerk), Jim Ishida ()
• With: Lynne Randall (Mrs. Engals), Fred Hemmings (Announcer), Patch MacKenzie (Girl), Vladimir (Pomo)
• Written By: B.W. Sandefur
• Directed By: Steven H. Stern

• Starring: Pamela Sue Martin (Nancy Drew)
• Also Starring: George O'Hanlon Jr. (Ned Nickerson), Jean Rasey (George Fayne)
• And: William Schallert (Carson Drew)
• Guest Stars: David Wayne (John Addams), H.M. Wynant (Peter Howard), Les Lannom (George Tompkins), Susan Woollen (Cathy)
• Special Guest Stars: Dane Clark (Captain Powers)
• And: Joan Prather (Adriane)
• Co-Starring: Reb Brown (Tony Rosselli), Derek Murcott (1st Mate), Leone James (Interviewer), John Sistunk (Seaman)
• Tekeplay By: Michael Sloan
• Story By: Susan Woollen
• Directed By: Alvin Ganzer

• Starring: Shaun Cassidy (Joe Hardy), Parker Stevenson (Frank Hardy)
• Also Starring: Lisa Eilbacher (Callie Shaw), Edmund Gilbert (Fenton Hardy), Edith Atwater (Aunt Gertrude)
• Guest Stars: Rosalind Chao (Lily), Richard Loo (Chen), Herbert Voland (Chief Collig)
• Co-Starring: David Chow (Wang), Richard Lee Sung (Chu), Bill Saito (Chao)
• With: Brendan Burns (Haverman)
• Written By: Robert Pirosh
• Directed By: Stuart Margolin

• Starring: Pamela Sue Martin (Nancy Drew)
• Also Starring: George O'Hanlon Jr. (Ned Nickerson), Jean Rasey (George Fayne)
• And: William Schallert (Carson Drew)
• Guest Stars: Mark Harmon (Chip Garvey), Terry Kiser (Ben Halstead), Martin Kove (Pete Miller), Michael Pataki (Deputy Foley), Val Avery (Skipper), Jillian Kesner (Paula Clark)
• And Special Guest Star: Howard Cosell (Himself)
• Co-Starring: Terry Jastro (Director), Peter Fox (Directors Assistant)
• With: Marc Alaimo (Masked Man), William Larsen (Doctor Hull)
• Written By: Lou Shaw
• Directed By: Andy Sidaris