J.D. tries to persuade a smoker patient to quit smoking in order to impress Dr. Cox, who is just feeling lonely in his opinion. Elliot’s attitude towards Carla annoys her,…

Ted finally meets his mystery girl in the Slutty Pumpkin costume. Meanwhile, Barney learns he is part Canadian, and Lily has pregnancy brain.

Barney freaks out when Marshall bequeaths a “slap bet” slap to Ted and Robin. Meanwhile, Lily’s estranged father shows up for Thanksgiving.

When Jake makes an arrest without a lot of proof, he only has 48 hours to collect evidence, or else the “perp” will be released. After his unsuccessful interrogation of…