Pills

To handle her neurosis, Mrs. Stevenson takes pills. Her nightstand is covered in pill bottles. Taking pills reinforces the fact that Mrs. Stevenson has a mental condition.

Telephone

Used as Mrs. Stevenson's primary form of communication, the telephone is a link to the outside world and a link to murder. Mrs. Stevenson overhears her own murder plot on the telephone. However, she cannot save herself because her call to the police is a few seconds too late.

Knife

Wielded by George the killer, a knife is used to murder Mrs. Stevenson.

Clock

Used by Mrs. Stevenson to check the time repeatedly, it is discovered that Mrs. Stevenson's clock has stopped working some eight minutes after hearing the murder plot.

Lamp

A lamp is the source of light in Mrs. Stevenson's bedroom. It is knocked to the floor when Mrs. Stevenson thrashes about in terror as she...