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 line). 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 (Seek for Atlantis); June Lockhart and Robert Loggia (Dangerous Waters). 12, "The Mystery of the Ghostwriter's Cruise", is noteworthy as a result of it incorporates a sequence during which a tsunami appears to strategy a cruise ship, a deliberate homage to the 1972 disaster movie, The Poseidon Adventure, in which Martin had additionally starred. She later visitor starred in a Nancy Drew episode, "The Mystery of the Fallen Angels". Sidaris acknowledged that casting Nancy Drew was more durable, as "everybody had a fixed image in their heads" of what she was like. Adams needed Brotman and Sidaris to maintain the wholesome, conservative values of the characters; when Brotman and Sideris agreed, she accredited of the sequence, however with full script approval.

The episodes are then storyboarded by artists, who produce 500 to 800 drawings over three weeks while consulting the writer's script. Stevenson, Cassidy and Martin are credited as Starring. Martin, Stevenson, and Cassidy were all credited in all episodes, despite this system alternating between the characters. Whereas the characters were generally depicted as teenagers in the unique books and most earlier display adaptations, such because the serialized Hardy Boys tales of the 1950s' Mickey Mouse Club collection and the Bonita Granville Nancy Drew movies of the late 1930s, the Tv sequence "aged-up" Frank and Nancy, as Stevenson and Martin were both in their mid-20s; only Cassidy was nonetheless a teen at the time the series entered manufacturing. Adams had inherited the Syndicate from her father, Edward Stratemeyer, after his demise in 1930. In the late thirties, Warner Bros. At first, the 83-year-old Adams was skeptical. Adams about buying the film rights to the Drew sequence. This time, they cut the Nancy Drew character, and the collection, now titled The Hardy Boys, centered solely on the Hardys. The Hardy Boys and Nancy Drew were both successful ebook publishing franchises owned by the Stratemeyer Syndicate, a publishing group which owned many profitable children's guide traces.

Actress Jamie Lee Curtis auditioned for the role of Nancy Drew. Rick Springfield additionally portrayed Ned Nickerson in a single season two episode, but Springfield's role was unrelated to O'Hanlon's. Joe Hardy was engaged in the first episode, however his fiancée was killed in a success-and-run, investigated by the FBI. For the first season, the opening credits featured a maze below the collection title. For the third season, the series' theme song was remixed, and given more of an upbeat disco sound. This backlot street was later used within the Tom Hanks comedy movie The 'Burbs; the music video for Smash Mouth's hit song "All Star"; and as Wisteria Lane within the ABC drama Desperate Housewives, escort service in saket which the home of the Hardys additionally served the home of most important 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 replaced with clips from the series and a collage of ebook covers from the e book collection. 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 response with replacement Janet Louise Johnson, producers once once more rebooted the collection. Janet Louise Johnson was additionally in her late teens when she replaced Martin as Nancy Drew. The collection replaced the short-lived Cos, and aired earlier than 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 in the late 1950s, and a Saturday morning cartoon collection within the late 1960s, each of which disappointed Adams once more. Larson later stated the network had "cancellation remorse", whereas Stevenson stated that, years later, an ABC executive on the time mentioned his largest mistake was cancelling The Hardy Boys.