Mysterium (season 2.2)
Mysterium's Board Game Geek site: https://boardgamegeek.com/boardgame/181304/mysterium.
A treatise on Victorian parlors: http://www.thisvictorianlife.com/parlor.html.
An assortment of unusual Victorian parlor games: http://listverse.com/2013/01/29/10-weird-parlour-games-played-before-tv-existed/.
The cover art for this episode: [https://boardgamegeek.com/image/2838255/mysterium]