The Hardy Boys/Nancy Drew Mysteries Dangerous Waters (1977–1979) Online
- Original Title :
- Dangerous Waters
- Genre :
- TV Episode / Family / Mystery
- Year :
- 1977–1979
- Directror :
- Richard Benedict
- Cast :
- Shaun Cassidy,Parker Stevenson,Ed Gilbert
- Writer :
- Lee Sheldon
- Type :
- TV Episode
- Time :
- 1h
- Rating :
- 7.0/10
The Hardy Boys search for a missing young woman who is herself searching for buried treasure. Can they save her from her own greed?
| Episode credited cast: | |||
 | Shaun Cassidy | - | Joe Hardy |
 | Parker Stevenson | - | Frank Hardy |
 | Ed Gilbert | - | Fenton Hardy (as Edmund Gilber) (credit only) |
 | Jack Kelly | - | Harry Hammond |
 | Dane Clark | - | Hanson |
| Rebecca York | - | Ria Thomas |
 | Frank Marth | - | Niles Migley |
 | Robert Loggia | - | Maurice |
 | June Lockhart | - | Mrs. Migley |
| Maud Strand | - | Noel |
 | Austin Stoker | - | Perfect |
| T.J. Castronovo | - | Regis (as Tom Castronova) |
| Tom Newman | - | Phillipe |
| Rest of cast listed alphabetically: | |||
| David A. Cox | - | La Jaques |
The on- screen titles spells the name of the town Belfontaine. When the brothers are at the préfecture, the sign says Bellefontaine,