This episode takes place in three different settings: Gettysburg, Pennsylvania on November 19, 1863, London, England, UK from April 18 to April 19, 1832 and Washington, D.C. on April 18, 1862.
This is the first episode in which Phineas and Jeffrey travel in time to specifically interact with fictional characters (Fagin, Bill Sikes, the Artful Dodger, and Nancy).
Actor John Anderson portrayed Abraham Lincoln several times in his career due to his striking physical resemblance. This was the last time he did so on screen.
The matte painting used as an establishing shot for London is a Peter Ellenshaw matte painting from Mary Poppins (1964).
Robert Phalen had a small role in John Carpenter's Halloween (1978). The forty years later sequel also titled Halloween (2018) featured a scene where an episode of Voyagers was playing on a TV in the background.