"Ducky Tie" is a good episode of HIMYM, rapidly cutting back and forth between the funny plot, Barney trying to feel/see Lily's pregnancy boobs, and the serious plot, Ted reconnecting with his ex Victoria. Both plots are very solid, making this one a winner. We get to see how Barney came to wear the ducky tie, after seeing Lily's boobs which makes him loose the bet, and Victoria leaves Ted with parting words after she departs. (Thankfully, Victoria gets on the bus and leaves. I like her, but getting embroiled with Ted against would be problematic.)
When Victoria tells Ted that Robin is a problem and future Ted agrees with her that she was right, it's impossible not to be skeptical. We've seen the gang together for six seasons, two and half since Robin and Barney were over, and nothing has ever clued us in to Robin as the big problem. I don't get it, but I guess the writers will show us sooner or later.