Alyson Hannigan

Alyson on How I Met Your Mother Episode 1.06 "Slutty Pumpkin" - It’s Halloween party time. Ted hangs out at an old and busted party on the rooftop, hoping to see the girl in the strategically cut out pumpkin outfit he met four years ago — but lost her phone number and never saw her again. Lily and Marshall dress as a "gay pirate" (Jack Sparrow) and his parrot, and win the costume contest at the bar. Robin reveals a secret "boyfriend" but she can’t seem to get out of the single mode into a couples mode, and he dumps her.