Co-creator Craig Thomas has announced this new spoiler via Twitter that an hour-long holiday installment will air on December 17 — the series’ first ever super-sized event. “Some really big crap happens!” he teased. He also added that "Our amazing #himym cast made us behind-the-cameras folks cry more than once while shooting it. I mean, not me. Other people. Crybabies!"
The first episode of the night, season 8 episode 11 will be titled "The Silence of the Jinx" and the second episode, season 8 episode 12 will called "The Robin".