Continuity mistake: The Gentlemen's and Ladies' Department is on the first, third, or fourth floor of Grace Brothers, depending on the episode.
Continuity mistake: The set up of the canteen changes from episode to episode. It is never the same way twice.
Continuity mistake: Sometimes Mrs. Slocombe has discretion over both inventory and displays and what they will and will not sell in the ladies department, other times its Captain Peacock, Mr. Rumboldt or others that have the final say.
Continuity mistake: If a character says their assistant number throughout the show, they are different each time.
Answer: It usually just means seeing something weird or unusual, perhaps something someone wouldn't believe you saw without proof. The phrase is usually "haven't got your gun", although some people replace "gun" with "camera." Basically think about a hunter spending all week in the woods looking for the biggest [fill in the blank] and the one day he goes out into the woods without his gun and then finally sees it.
Bishop73