When Barney goes to Ted and Robyns apartment to get Noras phone number Robyn is drinking from a Tim Hortons mug.
When Ted calls Marshall on his phone, which ten years from now is supposed to show holograms of the caller, Marshall's hologram is shown with the same hairstyle he wears today, but in previous episodes showing flash forwards to ten years from now, like the college reunion in "How I Met Everyone Else," or when he opened Lily's death packet in "We're Not From Here," Marshall had a receding hairline to the point of baldness, just like Marvin, Sr.
Ted: You think Zoey's sleeping with the doorman?
The Captain: He always winks and tips his hat when he sees her! I know how these things start. He's holding her package and pretty soon she's holding his. And did you see that mustache? I will have him fired for this.
Ted: You can't have him fired.
The Captain: You're right. (starts waving a flail around) Maritime protocol demands physical retribution!
Ted: Oh, God, no! Not physical retribution! Now, stop!
The Captain: Who is this flower child, and what has he done with my lionhearted friend Ted Mosby?!
International Airdates: United Kingdom: June 23, 2011 on E4; Germany: October 26, 2011 on ProSieben; Czech Republic: February 9, 2012 on Prima COOL
The sound effects superimposed over girls talking towards the beginning of the episode (when Barney is ignoring them) is the same as the sound effects used for adults speaking in Peanuts cartoons.