1. "How I Met Your Mother" -- Season 1, Episode 6: “The Slutty Pumpkin”
There is no better episode to watch of "How I Met Your Mother" than “The Slutty Pumpkin”. In the episode, Ted meets a woman at a Halloween party dressed up as a slutty pumpkin. When she gives him her number on a Kit-Kat wrapper, Ted loses it and waits year after year for her to appear at another Halloween party. The romantic in Ted is on full display throughout the entire episode and it shows how important it is to choose the right Halloween costume.