The title and the story deals with Lotta Crabtree, an American actress who toured the country and became one of the wealthiest and most beloved American entertainers of the late 19th century.
Adam Cartwright faces a Gunslinger dressed in all black; the attire Adam later adapts for the rest of his time on the series.
The Season 11 episode "Return Engagement" first aired on March 1, 1970 was a sequel to this premiere episode of the series "Bonanza". The role of famed 19th Century American actress Charlotte Mignon "Lotta" Crabtree, performed by Yvonne DeCarlo in this episode was subsequently played by Sally Kellerman.
A few years later, Yvonne De Carlo, who plays Lotta, started playing her most well known role as Lily on the sitcom The Munsters (1964).
Little Joe ("young," per Ben) took a real "liking" to Lotta, an older woman. In real life, Michael Landon was 22 years old when this episode originally aired. As for Yvonne De Carlo, in real life, she was 38 years old.