VIDEO: Sneak Peek - 'P.S. I Love You' Episode of CBS's HOW I MET YOUR MOTHER

On the next episode of the CBS comedy HOW I MET YOUR MOTHER entitled '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. The episode airs Monday, Feb. 4 (8:00-8:30 PM, ET/PT) on the CBS Television Network. Get a sneak peek below!

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 Jeanette, Ted's newest girlfriend, and Dave Thomas as music agent Chuck Gerusi.

HOW I MET YOUR MOTHER is a comedy about Ted and how he fell in love. It all started when Ted's best friend, aspiring environmental lawyer Marshall, proposed to his college sweetheart, Lily, a kindergarten teacher. Now that the two have had a baby, Ted realizes that he had better get a move on it if he too hopes to find true love. Helping him in his quest to find his future wife is Barney, a friend with endless, sometimes outrageous opinions, a penchant for suits and a foolproof way to meet women. When Ted meets Robin, he's sure it's love at first sight, but after a whirlwind romance with her, he realizes destiny has something else in store for him. The series is narrated through flashbacks from the future.

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