Josh Radnor (Mercy Street)
Jason Segel (The Muppets)
Cobie Smulders (Agents of SHIELD)
Neil Patrick Harris (Starship Troopers)
Alyson Hannigan (Date Movie)
Bob Saget (Full House)
Katie Holmes (Batman Begins)
Christina Pickles (Legends of The Fall)
Lyndsy Fonseca (Agent Carter)
David Henrie (Paul Blart: Mall Cop 2)
Future Ted reminds his kids that ten years earlier he met the Slutty Pumpkin, a girl in a provocative pumpkin costume who appeared to be very compatible with him, during the rooftop Halloween party. However, he lost the Kit Kat on which she had written her number and waited each year in vain for her to appear again.
In October 2011, Ted sees the slutty pumpkin costume in the window of a shop, where the owner willingly divulges, from his records, the identity of the woman who rented it in 2001. Ted meets Naomi, the girl who wore the costume; she has also been searching for him, and they start dating. Ted immediately realizes they have no chemistry and that he has no feelings for her, but he can’t bring himself to end the relationship so quickly after finally finding her. When Ted decides that he needs to break up with Naomi, he’s stunned to see her wear the slutty pumpkin costume; he says that he loves her and they have sex. They arrive at the Halloween party on the roof wearing the costumes they wore when they first met. After Naomi consumes a Tootsie Roll cocktail, she confesses that she found their relationship as awkward as Ted did, but felt similarly resistant to ending it (though Ted does not reveal to her how he felt). They break up amicably.
Meanwhile, Lily’s judgement is impaired by the fact that she has “pregnancy brain”, and impulsively decides she wants to live in the suburbs after she and Marshall are given her grandparents’ house. Though Marshall wants to live in the suburbs, he does not want to take advantage of Lily’s state of mind. Under the pretense of arranging for a real-estate broker to assess the house, Lily tries to trick Marshall into giving in due to the wholesomeness of the trick-or-treaters who soon arrive. However, when Lily realizes how her pregnancy brain has affected her ability to make decisions, she agrees to wait until she can think clearly before she and Marshall decide whether they want to move away from the city.
In the meantime, Robin learns from Barney’s father Jerome Whittaker through Facebook that Barney’s paternal grandmother was born in Manitoba, thus making Barney one-quarter Canadian. Barney is horrified and Robin teases him as revenge for all the mockery she endured from him over the years. She agrees to stop if Barney wears a Mountie costume for the Halloween party on the roof, but Barney resists and winds up wearing an American-themed boxing outfit instead. Robin points out that Barney is not uncomfortable on the cold rooftop in his shirtless costume, due to his Canadian ancestry. When he returns home later, a fantasy sequence ensues in which his Canadian side manifests physically and Barney futilely tries to beat him up; the Canadian version of Barney is unfailingly polite, friendly – and unharmed – throughout the attack.
Katie Holmes performance makes this episode a highlight. and seeing Ted finally get to see the Slutty Pumpkin was awesome. a Worthy sequel to The Slutty Pumpkin of Season 1.