A child custody case turns deadly after a stack of gambling IOUs is used against Perry's client.
An old man seems to be giving his money away, something his nephew and wife try to stop by having him committed. But once he escapes from the sanitarium, he's accused of murder.
A pretty secretary enlists Perry Mason's help when she finds herself framed in a blackmail plot, then is accused of the death of her employer's wife.
Telescopic photographs of a man in the act of committing a murder become the principal evidence sought by Perry Mason.
A killer terrorizes people who could testify against him.