"How I Met Your Mother" Season 9, Episode 17, titled "Sunrise," is the CBS comedy show's tribute to HIMYM fans who keep a list of Ted Mosby's ex-girlfriends in the show's 9-year run. Robin Scherbatsky has her own Top 5, but she deliberately excludes herself. Will fans see the true and final ending of the Ted and Robin lovestory?

Spoiler alert: This feature contains spoilers on How I Met Your Mother Season 9, Episode 17, aka Sunrise. HIMYM fans will be treated to a number of special guest stars. Scroll down to watch the promo video of the episode.

In HIMYM 9x17, Barney (Neil Patrick Harris) sneaks out drunk on the night before his wedding. It appears bestman Ted (Josh Radnor) and bride Robin (Cobie Smulders) wind up at the beach looking for the groom. The ex-lovers start talking about Mosby's ex-girlfriends, and Robin reveals her list of Ted Mosby's Top 5 best ex-girlfriends.

Ashley Williams reprises her role as Victoria, Robin's top favourite ex-girlfriend among Ted's past relationships. "The pastry chef," Robin says, "is the best." Do HIMYM fans agree?

How I Met Your Mother Season 9 is a lengthy farewell to fans, so naturally, Sarah Chalke's Stella is making an appearance, too. Fans would remember that Robin had a meltdown over the idea of Ted marrying Stella in Season 4. And that's when Robin dug out the locket from the Central Park grounds.

As the title suggests, Ted and Robin would watch the sunrise together. One of the spoiler photos suggest the moment, which lasts overnight, ends in a handshake. (See this Zap2It report for spoiler photos.)

Will the "shippers" of Ted and Robin give up now? Will Marshall (Jason Segel) pay up Lily (Alyson Hannigan) finally? It will be recalled that Lily has bet Marshall that Robin and Ted will not end up together. This special How I Met Your Mother Season 9 episode may or may not show who pays up whom in the Ted and Robin bet.

Watch: 'How I Met Your Mother' Season 9, Episode 17, 'Sunrise' CBS Promo Video on YouTube

Now, where is Barney, and what's on his mind when he decides to sneak out of Ted's room? How will Marshall and Lily decide on their Rome adventure versus New York judgeship dilemma? Fans should catch How I Met Your Mother Season 9, Episode 17, Sunrise. Just like the very special 200th episode, it seems this is one of the most important installments in the show's history.

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