The final line of the episode refers to the 1970 Spaghetti Western "They Call Me Trinity."
Opens with the quote "Nobody knows the trouble I've seen, nobody knows my sorrow", from the African American spiritual song "Nobody Knows the Trouble I've Seen"
The opening quote mirrors the episode title and presages the introduction of the new character Trubel.
There is no historiography titled "The Rise and Fall of the Roman Empire". The actual title of the six-volume work by the English historian Edward Gibbon is "The History of the Decline and Fall of the Roman Empire".
The "previously on" at the beginning was spoken by Renard.