Roswell That Ends Well - S4-E1
Corrected entry: The sergeant refers to Fry's grandfather Enos by his first name, something that would never happen. A superior officer - especially a non-com - would refer to him as "Fry", "Private" or "Private Fry". No army sergeant ever referred to an enlisted man by his first name.
Correction: A Sergeant is not an officer, he is enlisted just like the privates. The one in question was probably an E6 or E7.
Correction: You've clearly never been in the military. First names and nicknames will get used, especially if they are unusual.
Grumpy Scot