Miss Scarlet and The Duke — S1E6 — 106
Synopsis
The finale sees Eliza discover who murdered her father and why; Moses is the prime suspect, but the real murderer turns out to be someone who has been under The Duke's nose the entire time.
About the series
The 1850s: the fearless and inquisitive Miss Scarlet runs her late father's detective agency with the help of Inspector Wellington ('The Duke'), housekeeper Ivy, and savvy crook Moses.