What are the release dates for The Hardy Boys Nancy Drew Mysteries - 1977 Mystery of Cove 1-2?

There is no record of a television series or movie called "The Hardy Boys Nancy Drew Mysteries" with an episode called "Mystery of Cove." There may be a slight error in the title or details.

To help me find what you're looking for, can you please:

* Double check the title and year: Are you sure it's "The Hardy Boys Nancy Drew Mysteries" and "Mystery of Cove"? Are you sure it's 1977?

* Provide any other details you may remember: For example, are you thinking of a specific episode or season? Do you remember any plot details?

* Are you looking for a TV series or movie?

With more information, I can help you find the correct release date.