Nicholas Hammond and John Karlen (The Lady on Thursday at Ten); Melanie Griffith (The House on Possessed Hill); Kim Cattrall and Linda Dano (Voodoo Doll); Valerie Bertinelli, Stepfanie Kramer and Kim Lankford (Campus Terror); and Ana Alicia (Life on the road). Lloyd Bochner and Dorothy Malone (The House on Possessed Hill); Diana Muldaur (Sole Survivor); Ray Milland and Howard Duff (Voodoo Doll); Vic Damone, Fabian and Troy Donahue (Mystery on the Avalanche Express); Jack Jones (Death Surf); Pernell Roberts and Joseph Cotten (Arson and Old Lace); Kevin Tighe (Last Kiss of Summer) Dana Andrews and Patrick Macnee (Assault on the Tower); John Colicos (Search for Atlantis); June Lockhart and Robert Loggia (Dangerous Waters). 12, "The Mystery of the Ghostwriter's Cruise", Karur escort service is noteworthy as a result of it comprises a sequence by which a tsunami appears to method a cruise ship, a deliberate homage to the 1972 disaster film, The Poseidon Adventure, by which Martin had also starred. She later visitor starred in a Nancy Drew episode, "The Mystery of the Fallen Angels". Sidaris stated that casting Nancy Drew was tougher, as "everyone had a fixed picture in their heads" of what she was like. Adams wished Brotman and Sidaris to keep the healthful, conservative values of the characters; when Brotman and Sideris agreed, she permitted of the series, however with full script approval.

The episodes are then storyboarded by artists, who produce 500 to 800 drawings over three weeks whereas consulting the writer's script. Stevenson, Cassidy and Martin are credited as Starring. Martin, Stevenson, and Cassidy had been all credited in all episodes, despite the program alternating between the characters. Whereas the characters were generally depicted as teenagers in the unique books and most previous display screen adaptations, such as the serialized Hardy Boys tales of the 1950s' Mickey Mouse Club series and the Bonita Granville Nancy Drew films of the late thirties, the Tv sequence "aged-up" Frank and Nancy, as Stevenson and Martin were each in their mid-20s; solely Cassidy was nonetheless a teen at the time the collection entered production. Adams had inherited the Syndicate from her father, Edward Stratemeyer, after his demise in 1930. Within the late thirties, Warner Bros. At first, the 83-year-outdated Adams was skeptical. Adams about shopping for the movie rights to the Drew sequence. This time, they reduce the Nancy Drew character, and the series, now titled The Hardy Boys, targeted solely on the Hardys. The Hardy Boys and Nancy Drew had been both successful e-book publishing franchises owned by the Stratemeyer Syndicate, a publishing group which owned many successful children's book traces.

Actress Jamie Lee Curtis auditioned for the role of Nancy Drew. Rick Springfield also portrayed Ned Nickerson in one season two episode, however Springfield's position was unrelated to O'Hanlon's. Joe Hardy was engaged in the first episode, but his fiancée was killed in a hit-and-run, investigated by the FBI. For the first season, the opening credit featured a maze underneath the sequence title. For the third season, the series' theme track was remixed, and given more of an upbeat disco sound. This backlot street was later used in the Tom Hanks comedy movie The 'Burbs; the music video for Smash Mouth's hit tune "All Star"; and as Wisteria Lane within the ABC drama Desperate Housewives, during which the home of the Hardys additionally served the house of fundamental character Susan Mayer. Universal gave the project to Glen A. Larson, who had produced the police drama Get Christie Love! At the top of the haunting theme music, the voice-over announcer (William Conrad) would state who was featured within the episode and the episode title.

For the second season, the title sequence was altered; the maze was changed with clips from the collection and a collage of ebook covers from the book sequence. Following the ending of the second season, the Nancy Drew character was dropped, and the sequence was re-titled The Hardy Boys. Following the departure of Pamela Sue Martin and the subsequent mixed reaction with substitute Janet Louise Johnson, producers once again rebooted the sequence. Janet Louise Johnson was also in her late teenagers when she changed Martin as Nancy Drew. The series changed the brief-lived Cos, and aired before Top 10 hits The Six Million Dollar Man and The ABC Sunday Night Movie. The Hardy Boys had previously been tailored for The Mickey Mouse Club within the late 1950s, and a Saturday morning cartoon series in the late 1960s, both of which upset Adams once more. Larson later said the network had "cancellation remorse", while Stevenson mentioned that, years later, an ABC executive at the time mentioned his greatest mistake was cancelling The Hardy Boys.