Night Monster (1942)
Kurt Ingston, a rich recluse, invites the doctors who left him a hopeless cripple to his desolate mansion in the swamps as one by one they meet horrible deaths
Crash Landing (1958)
Airplane passengers prepare for a crash landing in the ocean
Mr Peabody and the Mermaid (1948)
While on vacation in the Caribbean with his wife, a middle aged man unexpectedly finds, and falls in love with, a mermaid