How I Met Your Mother‘s Barney and Robin will eventually get hitched, but the road to the altar won’t be without its obstacles — namely, as we learned in this week’s episode, in the form of her co-worker Patrice. We’ve got the snapshots to prove that the new relationship is chugging right along.

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In the Dec. 10 outing of the CBS comedy, Robin becomes suspicious of Barney’s new romance. But that’s nothing compared to what she may be feeling during the hour-long holiday episode, “The Final Page, Part One and Two” (airing Dec. 17), in which Barney drops a bombshell — he tells Ted he plans to propose to Patrice! Will Ted spill the beans to Robin in time for her to stop him? This being HIMYM, we also have to ask: Could it all be a trick to distract us from the real engagement? (And why is Barney covered in blood?!)

Check out the gallery below, which also features a mini Buffy reunion with guest star Seth Green playing Marshall and Lily’s college acquaintance, and then hit the comments with your thoughts/theories!