Wasps' Nest - S3-E5
Factual error: When we see the cover of Vogue magazine where Molly Deane appears, the recreation is not bad (the lettering used is not a classic Vogue one but something very similar was used for instance in August of the same year as portrayed), but the bar at the bottom gets the date wrong, putting it down as September 10th 1935, when Vogue always had 1st and 15th of the month as date of the release, no matter the day of the week. Also, it completely omits for instance the price. Would be a pretty difficult magazine to sell without that, real Vogue covers have that detail prominently displayed. (00:03:20)
Wasps' Nest - S3-E5
Factual error: When John Harrison check out of the organizer, the days of the week are wrong for a 1935 setting (September 24th is a Monday, etc), looks like a 1934 one. (00:12:00)