We finally learn Lady Silence's real name - Silna.
The song "Polar Sirens" featured from this episode by David Bickley and Tom Green is from their 2007 concept album Erebus & Terror - inspired by the very subject the series is depicting.
David Walmsley (Sgt. Solomon Tozer) & Adam Nagaitis (Cornelius Hickey) also worked together on Banished (2015) as William Stubbins & Private Buckley respectively.