The title is from an ancient proverb:
"For want of a nail the shoe was lost.
For want of a shoe the horse was lost.
For want of a horse the rider was lost.
For want of a rider the battle was lost.
For want of a battle the kingdom was lost.
And all for the want of a horseshoe nail."
First appearance of Sergeant Zale played by Johnny Haymer.
Margaret's parents gave each other several odd gifts on their wedding night. In this episode it's a riding crop, and in others a pistol and a flask among other things.
Klinger refers to Hot Lips as Major O'hollihan .