Factual error: The camera is scanning under the bed where Vanessa is lying and shows an ashtray full of cigarette butts. The cigarette butts have filters. Filters weren't invented until 1934, but the show is set in the 1800's.
Penny Dreadful (2014)
1 mistake in The Day Tennyson Died
Starring: Eva Green, Timothy Dalton, Reeve Carney, Rory Kinnear
Trivia: A "Penny Dreadful" was one of several terms used to describe cheap horror comic books that were popular among the lower economic classes of Victorian England.