Annan certainly remembered that time.
His estranged uncle, who he had never met and who had never even married, was killed by the Hand of Winter during that kidnapping incident when they were rescuing hostages. Later, Ivan's father also died of depression because of this.
The decisive Hand of Winter who killed the hostage, was the old man who later followed Maria to the White Tower.
"...What exactly is 'The Worm'?"
Annan carefully asked, "Is there some kind of trap in this room?"