Characters
Remember, remember the Fifth of November, the gunpowder, treason and plot. For I see no reason why the gunpowder treason, should ever be forgot.
— V • V for Vendetta

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The rhyme urges people to remember the Fifth of November and its gunpowder plot. The speaker says they see no reason why this treason should ever be forgotten, framing the event as one deserving permanent memory and insisting it stay in public awareness.
Context reviewed