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 (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 in which a tsunami appears to method a cruise ship, a deliberate homage to the 1972 disaster film, The Poseidon Adventure, wherein Martin had also starred. She later visitor starred in a Nancy Drew episode, "The Mystery of the Fallen Angels". Sidaris acknowledged that casting Nancy Drew was harder, as "everyone had a set image in their heads" of what she was like. Adams wished Brotman and Sidaris to maintain the healthful, conservative values of the characters; when Brotman and Sideris agreed, she authorized of the collection, but 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, regardless of this system alternating between the characters. Whereas the characters had been generally depicted as teenagers in the unique books and most previous display adaptations, such as the serialized Hardy Boys stories of the 1950s' Mickey Mouse Club series and the Bonita Granville Nancy Drew movies of the late thirties, the Tv collection "aged-up" Frank and Nancy, as Stevenson and Martin were each of their mid-20s; only Cassidy was still a teen at the time the collection entered production. Adams had inherited the Syndicate from her father, Edward Stratemeyer, after his loss of life in 1930. In the late thirties, Warner Bros. At first, the 83-year-previous Adams was skeptical. Adams about buying the film rights to the Drew collection. This time, they lower the Nancy Drew character, and the sequence, now titled The Hardy Boys, focused solely on the Hardys. The Hardy Boys and Nancy Drew had been each successful guide publishing franchises owned by the Stratemeyer Syndicate, a publishing group which owned many profitable youngsters's book lines.

Actress Jamie Lee Curtis auditioned for the position of Nancy Drew. Rick Springfield additionally portrayed Ned Nickerson in a single season two episode, but Springfield's position was unrelated to O'Hanlon's. Joe Hardy was engaged in the primary episode, but his fiancée was killed in a hit-and-run, investigated by the FBI. For the primary season, the opening credits featured a maze beneath the sequence title. For the third season, the collection' theme tune was remixed, and given more of an upbeat disco sound. This backlot avenue was later used within the Tom Hanks comedy movie The 'Burbs; the music video for Kannur escort service Smash Mouth's hit track "All Star"; and as Wisteria Lane within the ABC drama Desperate Housewives, through which the house of the Hardys also served the house of principal character Susan Mayer. Universal gave the project to Glen A. Larson, who had produced the police drama Get Christie Love! At the tip 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 sequence and a collage of book covers from the guide series. Following the ending of the second season, the Nancy Drew character was dropped, and the collection was re-titled The Hardy Boys. Following the departure of Pamela Sue Martin and the following blended response with replacement Janet Louise Johnson, producers once again rebooted the series. Janet Louise Johnson was additionally in her late teenagers when she replaced Martin as Nancy Drew. The collection changed the quick-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 adapted for The Mickey Mouse Club within the late 1950s, and a Saturday morning cartoon series in the late 1960s, both of which disenchanted Adams again. Larson later acknowledged the network had "cancellation remorse", while Stevenson stated that, years later, an ABC executive on the time mentioned his greatest mistake was cancelling The Hardy Boys.