The Hardy Boys become owners of the Chinese junk Hai Hau. They head to New York City and go spelunking to break up a gang of criminals.
Director:
Tim Matheson
Joe Hardy
Richard Gates
Frank Hardy
Jan-Michael Vincent
Tony Prito (as Mike Vincent)
Portia Nelson
Aunt Gertrude Hardy
Ricky Kelman
Biff Hooper
Richard Anderson
Fenton Hardy
Edward Andrews
Dr Montrose
James Shigeta
George Ti Ming
Teri Garr
Susie
