You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "when does the mother come in how i met your mother?" whose answer is last episode of season 8.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when does the mother appear in how i met your mother
Useful Output:

Doc 1: Season 8, Episode 4 (2012). How I Met Your Mother-4 Image via CBS. Through the series
Doc 2: The Mother's identity is officially revealed in the Season 8 finale, when we watch a woman (Cristin Milioti) carrying the yellow umbrella we've known since
Doc 3: Toward the end of the show, fans discover that Ted's wife, and the mother of his kids, is named Tracy McConnell. But the name Tracy pops up long
Doc 4: After 208 episodes, the CBS comedy, "How I Met Your Mother," finally revealed how it all happened. Ben Tracy reports on the series' closing
Doc 5: The character, whose name was Tracy, was played by actress Cristin Milioti. She first appeared in the HIMYM season 8 finale before she was