The date of the events of this story is August 1878, based on the tombstone for Mary Sievers, who was mentioned as having died 4 months ago. April 1878 is on the tombstone.
This is the last appearance of Gage Clarke. He died a couple weeks before this episode aired. Mr. Clarke occasionally played the roles of Mr. Dobie at the Dodge House, and Mr. Botkin, the banker, as he did in this episode. Roy Roberts, who also played Mr. Dobie a couple times, will take over the role of Mr. Botkin (occasionally spelled Bodkin in the credits) until 1974.
The Long Branch Saloon's door leading to the back alley has a sign that reads "LONGBRANCH - Deliveries Only". This is a rare instance where the saloon's name is spelled as a single word, rather than two words.
The title is from the common expression: I am not my brother's keeper.