How I Met Your Mother season 6 episode 12 False Positive Synopsis:
When Marshall and Lily receive shocking news, it has a profound effect on the gang and forces them to reexamine their own lives. Meanwhile, Robin gets a new job, Barney discovers the joy of giving on Christmas and Ted begins his duties as Best Man for his old friend Punchy’s wedding.
Don't forget to watch How I Met Your Mother s06e12 False Positive only on Television Network. Alex Trebek guest stars as himself and Tony Award winner Ben Vereen returns as Sam.