Trivia: When Ted and Robin are at the restaurant, they are accidentally sent a champagne glass with an engagement ring in. A man then claims the ring and proposes to his girlfriend. This couple really did get engaged on the show - the guy set up the surprise proposal, as his girlfriend thought they were just there as extras.
Trivia: Chris Elliott plays Mickey Aldrin, father of Lily Aldrin (Alyson Hannigan). In real life, Elliott is only 14 years older than Hannigan.