Season 3

When a famous campaigner for temperance is found dead, Father Brown wonders about the cause of death.

The high priest of a new "religion" of sun-worshipers clashes with Father Brown when one of his acolytes dies mysteriously.

When a headless body is found in a garden, and then a severed head is found in the same garden a short time later, people assume that one goes with the other. Father Brown isn't so sure.

A young man relates a story of premonition of danger which he calls "The Red Signal." That evening at a dinner party, the entertainment is a medium who, in a trance, warns, "Do not go home." Later, one of the people is murdered.