Guests are killed, but not a single one-except the final one shows the death explicitly.

First: A man is poisoned by his drink.

Second: A woman dies from an overdose of sleeping pills.

Third: A man is stabbed with a curved knife (no blood).

Fourth: A man's cranium is split with an axe.

Fifth: A woman is killed by a hypodermic needle injection.

Sixth: A man is shot through the head (we later find out this was not so).

Seventh: A man dies a mysterious death from the sea (take note this is revealed after the eighth death).

Eighth: A man is killed by a chunk of the house falling on top of him.

A man dies by drinking poison.

The word "devil", as in "what the devil", presumably used in place of "what the hell", which would not have been allowed by censors of the time.

Drugs, recreational: None

Occasional and casual smoking and drinking. The butler at one point drinks a little too much. "Nikki" is completely drunk when he sings the song at the piano.

The setting is full of subtle duplicity and darkness.