Historical events pivotal to the plot of this story establish its time frame as early Summer 1867. Emperor Maximilian of Mexico ruled from 1864 until his execution on June 19, 1867 by order of Benito Juarez.
Actor Doug McClure married the actress who played "Estrelita" a year after this show was filmed. BarBara Luna and McClure ("Flip Flippen") were married in 1961; they divorced in 1963.