The painting Ethan's father Jared Talbot shows to Sir Malcolm was made by the American ornithologist and painter John James Audubon in 1845 and bears the title White American Wolf.
This is the first episode of the show to be written by somebody other than John Logan.
Considered to be the main character of the series, this is the second episode not to feature Vanessa Ives; the other being season 2, episode 8, Memento Mori.
The only episode not to feature Eva Green as Vanessa Ives.