How I Met Your Mothe 8x15 Promo “P.S. I Love You“ (HD)

How I Met Your Mother 8x15 “P.S. I Love You“ - Barney uncovers the lost episode of Robin’s “Underneath the Tunes“ as Robin Sparkles. Meanwhile, Marshall and Lily are concerned that Ted’s new girlfriend is a stalker, on HOW I MET YOUR MOTHER, Monday, February 4th on CBS. Canadian celebrities including Alan Thicke, Jason Priestley, Paul Shaffer, Alex Trebek, K.D. Lang, Steven Page, Geddy Lee and Luc Robataille guest stars as themselves. James Van Der Beek guest stars as Simon, Abby Elliot guest stars as Jeane