Who will derail Barney and Robin’s nuptials on How I Met Your Mother?

That’s the question at the center of the first promo for the CBS sitcom’s final season (premiering Sept. 23 at 8/7c), and Ted appears to be a prime suspect. Thankfully, Lily is there to, literally, knock him out of the way.

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Press PLAY to watch the sneak peek, then hit the comments with your thoughts.