Charlene Amoia

Ted's family's visit to New York leads to the discovery of a family secret. Lily and Marshall struggle to get used to their new relationship.

After Marshall sees a documentary about an island in the Pacific used as a landfill, he becomes determined to save the environment.

Lily gets a touch of the green eyes when Marshall goes on his first date after their split, and Marshall's date has her own ocular problem, `crazy eyes'.

Return of the Shirt

Barney approaches a personal milestone: sleeping with the first woman he hits on seven nights in a row. However, is Barney using this to cover a bigger problem? Elsewhere, Lily and Marshall realise that they've been using the same toothbrush, Robin waits to hear back from a date and Ted insults one of his students.

Ted's friends discourage him from going on a date with his tattoo removal doctor because they warn that if it doesn't go well, he'll still have to see her in everyday life. Elsewhere, Barney tells his friends about his `Platinum Rule' in an effort to convince Ted to cancel the date.