'If you love the Hitchcock style of cinematography and storytelling this episode is a "Must Watch". If you are a fan of Hitchcock you'll see several shots that are textbook 'Hitchcock". Michael Rennie adds a great performance in a role that wavers between cool, and collected , think "The Day the Earth Stood Still', and full out panic mode. Phyllis Thaxter, an actor movie buffs will recognize even if the name is unfamiliar, is amazing in a role that, for about ¾ of the show, requires of her express all of her emotions facially.
At this point I haven't watched all of the episodes in this series but this one is my fav so far.