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 because it incorporates a sequence wherein a tsunami seems to method a cruise ship, a deliberate homage to the 1972 disaster film, The Poseidon Adventure, through which Martin had also starred. She later guest starred in a Nancy Drew episode, "The Mystery of the Fallen Angels". Sidaris stated that casting Nancy Drew was harder, as "everyone had a hard and fast image of their heads" of what she was like. Adams wished Brotman and Sidaris to keep the wholesome, conservative values of the characters; when Brotman and Sideris agreed, she accepted of the series, 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 have been usually depicted as teenagers in the original books and most previous screen adaptations, such as 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 had been both of their mid-20s; only Cassidy was still a teen at the time the sequence entered production. Adams had inherited the Syndicate from her father, Edward Stratemeyer, after his death in 1930. In the late thirties, Warner Bros. At first, the 83-year-old Adams was skeptical. Adams about buying the movie rights to the Drew series. This time, they minimize the Nancy Drew character, and the collection, now titled The Hardy Boys, focused solely on the Hardys. The Hardy Boys and Nancy Drew have been each profitable e book publishing franchises owned by the Stratemeyer Syndicate, a publishing group which owned many successful youngsters's e-book lines.

Actress Jamie Lee Curtis auditioned for the role of Nancy Drew. Rick Springfield additionally portrayed Ned Nickerson in one season two episode, but Springfield's function was unrelated to O'Hanlon's. Joe Hardy was engaged in the first episode, however his fiancée was killed escort agency in Pocharam a hit-and-run, investigated by the FBI. For the first season, the opening credits featured a maze underneath the series title. For the third season, the sequence' theme tune was remixed, and given more of an upbeat disco sound. This backlot avenue was later used in 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, by which the home of the Hardys additionally served the home of primary character Susan Mayer. Universal gave the assignment 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 sequence and a collage of book covers from the ebook collection. Following the ending of the second season, the Nancy Drew character was dropped, and the series was re-titled The Hardy Boys. Following the departure of Pamela Sue Martin and the next combined reaction with replacement Janet Louise Johnson, producers as soon as once more rebooted the sequence. Janet Louise Johnson was also in her late teenagers when she changed Martin as Nancy Drew. The collection replaced the brief-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 adapted for The Mickey Mouse Club in the late 1950s, and a Saturday morning cartoon collection in the late 1960s, each of which dissatisfied Adams once more. Larson later acknowledged the network had "cancellation remorse", while Stevenson said that, years later, an ABC executive on the time mentioned his greatest mistake was cancelling The Hardy Boys.