Henry Slesar had previously seen two of his short stories turned into episodes of The Twilight Zone (1959): The Old Man in the Cave (1963) and The Self-Improvement of Salvadore Ross (1964).
"Examination Day" has no narration, at either the beginning or the end. "A Message from Charity" has no opening narration.
"A Message from Charity" takes place in 1700 and 1985.
Michael Fox (Tom Carter) previously played a doctor in Nightmare as a Child (1960), a Martian in Mr. Dingle, the Strong (1961) and a psychiatrist in Sounds and Silences (1964).
Jonas Hacker died in 1704.
