Writers Christopher Markus and Stephen McFeely decided to use two often-seen female-spy tactics in the pilot, and then made sure they would not be repeated during the rest of the season. They are (1) getting out of a situation by claiming to have "female troubles" and (2) taking on the persona of a seductress.
Agent Carter wears red, white, and blue to work, as tribute to her fallen love, Captain America. This was acknowledged by the costume department.
The Vita ray scanner that Agent Carter uses has a tag that says "Property of Dr. Erskine." Dr. Abraham Erskine was the man who changed Steve Rogers into the super soldier Captain America in Captain America: The First Avenger (2011).
The effect of the Leviathan typewriter writing by itself was achieved by placing a second typewriter under the desk and attaching strings to the keys of the first. During the scenes, property master Sean Mannion sat below the desk to type each message.
Creator and Executive producer Christopher Markus reveals in the book "Agent Carter Season One Declassified" that the pilot's title was inspired by an early WWII speech by Winston Churchill, in which he said "Now this is not the end. It is not even the beginning of the end. But it is, perhaps, the end of the beginning."