Perry Mason: Season 1, Episode 10 Mia Moss | April 04, 2026 Synopsis Perry Mason takes a baffling case that involves a year-old homicide, arsenic poisoning and a disappearing corpse. Director Christian Nyby Executive Producer Gail Patrick Jackson Screenwriter Malvin Wald, Jack Jacobs Network CBS Rating TV-PG Genre Drama, Mystery & Thriller Original Language English Release Date Nov 23, 1957