Shaun Cassidy - Joe Hardy

    Parker Stevenson - Frank Hardy
    Ed Gilbert - Fenton Hardy
    Edith Atwater - Aunt Gertrude [ 1. Staffel ]
    Lisa Eilbacher - Callie Shaw [ 1. Staffel ]
    Jack Kelly - Harry Hammond [ 3. Staffel ]
    Phillip R. Allen - Harry Gibbon [ 3. Staffel ]
    Pamela Sue Martin - Nancy Drew [ 1-2. Staffel ]
    Janet Louise Johnson - Nancy Drew [ 2. Staffel ]
    William Schallert - Carson Drew [ 1-2. Staffel ]
    Jean Rasey - George Fayne [ 1. Staffel ]
    Susan Buckner - George Fayne [ 2. Staffel ]
    Ruth Cox a- Bess Marvin [ 1-2. Staffel ]
    George O'Hanlon Jr. - Ned Nickerson [ 1. Staffel ]

Quelle: epguides.com

• Season 1

1      1-01                30/Jan/77   The Mystery of the Haunted House
2      1-02                06/Feb/77   The Mystery of Pirate's Cove
3      1-03                13/Feb/77   The Mystery of Witches' Hollow
4      1-04                20/Feb/77   The Mystery of the Diamond Triangle
5      1-05                06/Mar/77   The Disappearing Floor
6      1-06                13/Mar/77   The Secret of the Whispering Walls
7      1-07                27/Mar/77   The Flickering Torch Mystery
8      1-08                03/Apr/77   A Haunting We Will Go
9      1-09                10/Apr/77   The Mystery of the Flying Courier
9      1-10                17/Apr/77   The Mystery of the Fallen Angels
11     1-11                24/Apr/77   Wipe Out
12     1-12                01/May/77   The Mystery of the Ghostwriter's Cruise
13     1-13                15/May/77   The Mystery of Jade Kwan Yin
14     1-14                22/May/77   The Mystery of the Solid Gold Kicker

• Season 2

15     2-01      48703     11/Sep/77   The Hardy Boys and Nancy Drew Meet Dracula (1)
16     2-02      48704     18/Sep/77   The Hardy Boys and Nancy Drew Meet Dracula (2)
17     2-03      48707     25/Sep/77   The Mystery of King Tut's Tomb
18     2-04      48705     02/Oct/77   The Mystery of the Hollywood Phantom (1)
19     2-05      48706     09/Oct/77   The Mystery of the Hollywood Phantom (2)
20     2-06      48708     16/Oct/77   The Mystery of the African Safari
21     2-07      48710     30/Oct/77   The Creatures Who Came on Sunday
22     2-08      48709     06/Nov/77   The Strange Fate of Flight 608
23     2-09      48713     13/Nov/77   Acapulco Spies
24     2-10      48604     20/Nov/77   Nancy Drew's Love Match
25     2-11      48715     27/Nov/77   The Mystery of the Silent Scream
26     2-12      48602     18/Dec/77   Will the Real Santa Claus..?
27     2-13      48603     01/Jan/78   The Lady on Thursday at Ten
28     2-14      48711     08/Jan/78   Oh Say Can You Sing?
29     2-15      48718     22/Jan/78   The House on Possessed Hill
30     2-16      48716     29/Jan/78   Sole Survivor
31     2-17      48720     12/Feb/78   Voodoo Doll (1)
32     2-18      48721     19/Feb/78   Voodoo Doll (2)
33     2-19      48723     26/Feb/78   Mystery of the Avalanche Express
34     2-20      48722     12/Mar/78   Death Surf
35     2-21      48726     01/Apr/78   Arson and Old Lace
36     2-22      48725     07/May/78   The Campus Terror

• Season 3

37     3-01      50817     01/Oct/78   The Last Kiss of Summer (1)
38     3-02      50818     08/Oct/78   The Last Kiss of Summer (2)
39     3-03      50809     15/Oct/78   Assult on the Tower
40     3-04      50812     22/Oct/78   Search for Atlantis
41     3-05      50808     29/Oct/78   Dangerous Waters
42     3-06      50819     05/Nov/78   Scorpion's Sting
43     3-07      50820     19/Nov/78   Defection to Paradise (1)
44     3-08      50821     26/Nov/78   Defection to Paradise (2)
45     3-09      50810     03/Dec/78   Game Plan
46     3-10      50801     14/Jan/79   Life on the Line